Management's Discussion and Analysis of Financial Condition and Results of
Operations should also be read in conjunction with the unaudited consolidated
financial statements and accompanying footnotes included under Item 1. Financial
Statements and in conjunction with our Annual Report on Form 10-K for the year
ended December 31, 2019.

Disclosures Regarding Forward-Looking Statements



This Quarterly Report on Form 10-Q, particularly Management's Discussion and
Analysis of Financial Condition and Results of Operations and Quantitative and
Qualitative Disclosures about Market Risk, includes forward-looking statements
that are subject to risks, contingencies or uncertainties. You can identify
forward-looking statements by words such as "anticipate," "believe,"
"commitment," "could," "design," "estimate," "expect," "forecast," "goal,"
"guidance," "imply," "intend," "may," "objective," "opportunity," "outlook,"
"plan," "policy," "position," "potential," "predict," "priority," "project,"
"proposition," "prospective," "pursue," "seek," "should," "strategy," "target,"
"will," "would" or other similar expressions that convey the uncertainty of
future events or outcomes.

Forward-looking statements include, among other things, statements regarding:



•     future levels of revenues and other income, income from operations, net
      income attributable to MPLX LP, earnings per unit, Adjusted EBITDA or DCF

(see the Non-GAAP Financial Information section below for the definitions

of Adjusted EBITDA and DCF);

• future levels of capital, environmental or maintenance expenditures,

general and administrative and other expenses;

• the success or timing of completion of ongoing or anticipated capital or

maintenance projects;

• the amount and timing of future distributions; and

• the anticipated effects of actions of third parties such as competitors,


      activist investors or federal, foreign, state or local regulatory
      authorities or plaintiffs in litigation.




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Our forward-looking statements are not guarantees of future performance and you
should not rely unduly on them, as they involve risks, uncertainties and
assumptions that we cannot predict. Material differences between actual results
and any future performance suggested in our forward-looking statements could
result from a variety of factors, including the following:

• the effects of the outbreak of COVID-19, including any related government


      policies and actions, and the adverse impact thereof on our business,
      financial condition, results of operations and cash flows, including our
      growth, operating costs, labor availability, logistical capabilities,
      customer demand for our services and industry demand generally, cash
      position, taxes, the price of our securities and trading markets with

respect thereto, our ability to access capital markets, and the global

economy and financial markets generally;

• the ability of Marathon Petroleum Corporation ("MPC") to achieve its

strategic objectives and the effects of those strategic decisions on us;

• the risk that anticipated opportunities and any other synergies from or

benefits of the Andeavor Logistics LP ("ANDX") acquisition may not be fully

realized or may take longer to realize than expected, including whether the


      transaction will be accretive within the expected timeframe or at all;

• disruption from the ANDX acquisition making it more difficult to maintain

relationships with customers, employees or suppliers;

• risks relating to any unforeseen liabilities of ANDX;

• further impairments;

• negative capital market conditions, including an increase of the current

yield on common units;

• the ability to achieve strategic and financial objectives, including with

respect to distribution coverage, future distribution levels, proposed


      projects and completed transactions;


•     the success of MPC's portfolio optimization, including the ability to

complete any divestitures on commercially reasonable terms and/or within


      the expected timeframe, and the effects of any such divestitures on the
      business, financial condition, results of operations and cash flows;

• adverse changes in laws including with respect to tax and regulatory matters;

• the adequacy of capital resources and liquidity, including the availability

of sufficient cash flow to pay distributions and access to debt on

commercially reasonable terms, and the ability to successfully execute

business plans, growth strategies and self-funding models;

• the timing and extent of changes in commodity prices and demand for crude

oil, refined products, feedstocks or other hydrocarbon-based products;

• volatility in or degradation of market and industry conditions as a result

of the COVID-19 pandemic, including any related policies and actions, other

infectious disease outbreaks, natural hazards, extreme weather events, or


      otherwise;


•     changes to the expected construction costs and timing of projects and
      planned investments, and the ability to obtain regulatory and other
      approvals with respect thereto;

• completion of midstream infrastructure by competitors;

• disruptions due to equipment interruption or failure, including electrical

shortages and power grid failures;

• the suspension, reduction or termination of MPC's obligations under MPLX's


      commercial agreements;


•     modifications to financial policies, capital budgets, and earnings and
      distributions;

• the ability to manage disruptions in credit markets or changes to credit


      ratings;


•     compliance with federal and state environmental, economic, health and

safety, energy and other policies and regulations or enforcement actions

initiated thereunder;

• adverse results in litigation;

• the reliability of processing units and other equipment;

• the effect of restructuring or reorganization of business components;

• the potential effects of changes in tariff rates on our business, financial

condition, results of operations and cash flows;

• foreign imports and exports of crude oil, refined products, natural gas and

NGLs;

• changes in producer customers' drilling plans or in volumes of throughput

of crude oil, natural gas, NGLs, refined products or other

hydrocarbon-based products;

• non-payment or non-performance by our producer and other customers;

• changes in the cost or availability of third-party vessels, pipelines,


      railcars and other means of transportation for crude oil, natural gas,
      NGLs, feedstocks and refined products;



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•     the price, availability and acceptance of alternative fuels and
      alternative-fuel vehicles and laws mandating such fuels or vehicles;


•     actions taken by our competitors, including pricing adjustments and the

expansion and retirement of pipeline capacity, processing, fractionation

and treating facilities in response to market conditions;

• expectations regarding joint venture arrangements and other acquisitions or

divestitures of assets;

• midstream and refining industry overcapacity or under capacity;

• accidents or other unscheduled shutdowns affecting our machinery,

pipelines, processing, fractionation and treating facilities or equipment,

or those of our suppliers or customers;

• acts of war, terrorism or civil unrest that could impair our ability to

gather, process, fractionate or transport crude oil, natural gas, NGLs or

refined products; and

• political pressure and influence of environmental groups upon policies and

decisions related to the production, gathering, refining, processing,

fractionation, transportation and marketing of crude oil or other

feedstocks, refined products, natural gas, NGLs or other hydrocarbon-based


      products.



For additional risk factors affecting our business, see the risk factors described in our Annual Report on Form 10-K for the year ended December 31, 2019, as updated in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2020. We undertake no obligation to update any forward-looking statements except to the extent required by applicable law.

MPLX OVERVIEW



We are a diversified, large-cap MLP formed by MPC, that owns and operates
midstream energy infrastructure and logistics assets, and provides fuels
distribution services. We are engaged in the transportation, storage and
distribution of crude oil and refined petroleum products; the gathering,
processing and transportation of natural gas; and the gathering, transportation,
fractionation, storage and marketing of NGLs. Our operations are conducted in
our Logistics and Storage and Gathering and Processing segments.

SIGNIFICANT FINANCIAL AND OTHER HIGHLIGHTS



Significant financial highlights including revenues and other income, income
from operations, net income, adjusted EBITDA attributable to MPLX and DCF
attributable to GP and LP unitholders for the three months ended September 30,
2020 and September 30, 2019 are shown in the chart below. These results include
the recast of ANDX financial information into MPLX's financial information as a
result of the Merger. See the Non-GAAP Financial Information section below for
the definitions of Adjusted EBITDA and DCF and the Results of Operations section
for further details regarding changes in these metrics.
                [[Image Removed: q3consolidatedhighlights.jpg]]

(1) Q3 2019 includes Adjusted EBITDA attributable to Predecessor and portion of


    DCF adjustments attributable to Predecessor.



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Other Highlights

RECENT DEVELOPMENTS

• On July 31, 2020, MPLX completed the exchange of Western Refining

Wholesale, LLC to Western Refining Southwest, Inc. ("WRSW"), a wholly

owned subsidiary of MPC, in exchange for the redemption of 18,582,088 MPLX

common units held by WRSW, valued at $340 million.

• On August 18, 2020, MPLX issued $3 billion aggregate principal amount of

new senior notes consisting of $1.5 billion aggregate principal amount of

1.750 percent senior notes due March 2026 and $1.5 billion aggregate

principal amount of 2.650 percent senior notes due August 2030. The net

proceeds were used to repay the $1.0 billion of outstanding borrowings

under the MPLX Term Loan Agreement, to repay the $1.0 billion floating

rate notes due September 2021, to redeem all of the $450 million aggregate

principal amount of 6.375 percent senior notes due May 2024, to reduce

amounts outstanding under the MPLX Credit Agreement at the time and to

redeem the $300 million aggregate principal amount of 6.250 percent senior


       notes due October 15, 2022 (these notes were redeemed on October 15,
       2020).

• On November 1, 2020, MPLX finalized the 2020 Terminal Services Agreement,

which replaces and simplifies several existing terminal services

agreements which were entered into by subsidiaries of Andeavor and

Andeavor Logistics LP. The simplification is expected to have no economic


       impact to MPLX.


•      On November 2, 2020, MPLX announced the board authorization of a unit
       repurchase program for the repurchase of up to $1 billion of MPLX's

outstanding common units held by the public. MPLX may utilize various

methods to effect the repurchases, which could include open market

repurchases, negotiated block transactions, tender offers, accelerated

unit repurchases or open market solicitations for units, some of which may

be effected through Rule 10b5-1 plans. The timing and amount of

repurchases, if any, will depend upon several factors, including market

and business conditions, and repurchases may be initiated, suspended or

discontinued at any time. The repurchase authorization has no expiration

date.

• Announced a third quarter distribution rate of $0.6875 per common unit.

CURRENT ECONOMIC ENVIRONMENT



The outbreak of COVID-19 and its development into a pandemic in March 2020 has
resulted in significant economic disruption globally. Actions taken by various
governmental authorities, individuals and companies around the world to prevent
the spread of COVID-19 through social distancing have restricted travel, many
business operations, public gatherings and the overall level of individual
movement and in-person interaction across the globe. This has significantly
reduced global economic activity and resulted in a decline in the demand for
products for which we provide midstream services. Macroeconomic conditions and
global geopolitical events have also resulted in significant price volatility
related to those aforementioned products.

We are actively responding to the impacts that these matters are having on our business by:

• Canceling or delaying certain capital expenditures that we had expected to

make in 2020

• Taking actions to reduce operating expenses across the business

• Continuing to evaluate and high-grade our capital portfolio





Many uncertainties remain with respect to COVID-19, including its resulting
economic effects, and we are unable to predict the ultimate economic impacts
from COVID-19 and how quickly national economies can recover once the pandemic
ultimately subsides. However, the adverse impact will likely continue to have an
impact on our business and our customers' businesses. We believe we have
proactively addressed many of the known impacts of COVID-19 to the extent
possible and will strive to continue to do so, but there can be no guarantee the
measures will be fully effective.

NON-GAAP FINANCIAL INFORMATION



Our management uses a variety of financial and operating metrics to analyze our
performance. These metrics are significant factors in assessing our operating
results and profitability and include the non-GAAP financial measures of
Adjusted EBITDA and DCF. The amount of Adjusted EBITDA and DCF generated is
considered by the board of directors of our general partner in approving MPLX's
cash distributions.


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We define Adjusted EBITDA as net income adjusted for: (i) depreciation and
amortization; (ii) provision/(benefit) for income taxes; (iii) amortization of
deferred financing costs; (iv) extinguishment of debt; (v) non-cash equity-based
compensation; (vi) impairment expense; (vii) net interest and other financial
costs; (viii) income/(loss) from equity method investments; (ix) distributions
and adjustments related to equity method investments; (x) unrealized derivative
gains/(losses); (xi) acquisition costs; (xii) noncontrolling interest; and
(xiii) other adjustments as deemed necessary. We also use DCF, which we define
as Adjusted EBITDA adjusted for: (i) deferred revenue impacts; (ii) net interest
and other financial costs; (iii) maintenance capital expenditures; (iv) equity
method investment capital expenditures paid out; and (v) other adjustments as
deemed necessary. MPLX makes a distinction between realized and unrealized gains
and losses on derivatives. During the period when a derivative contract is
outstanding, changes in the fair value of the derivative are recorded as an
unrealized gain or loss. When a derivative contract matures or is settled, the
previously recorded unrealized gain or loss is reversed and the realized gain or
loss of the contract is recorded.

We believe that the presentation of Adjusted EBITDA and DCF provides useful
information to investors in assessing our financial condition and results of
operations. The GAAP measures most directly comparable to Adjusted EBITDA and
DCF are net income and net cash provided by operating activities. Adjusted
EBITDA and DCF should not be considered alternatives to GAAP net income or net
cash provided by operating activities. Adjusted EBITDA and DCF have important
limitations as analytical tools because they exclude some but not all items that
affect net income and net cash provided by operating activities or any other
measure of financial performance or liquidity presented in accordance with GAAP.
Adjusted EBITDA and DCF should not be considered in isolation or as substitutes
for analysis of our results as reported under GAAP. Additionally, because
Adjusted EBITDA and DCF may be defined differently by other companies in our
industry, our definitions of Adjusted EBITDA and DCF may not be comparable to
similarly titled measures of other companies, thereby diminishing their utility.
For a reconciliation of Adjusted EBITDA and DCF to their most directly
comparable measures calculated and presented in accordance with GAAP, see
Results of Operations.

Management also utilizes Segment Adjusted EBITDA in evaluating the financial performance of our segments. The use of this measure allows investors to understand how management evaluates financial performance to make operating decisions and allocate resources.

COMPARABILITY OF OUR FINANCIAL RESULTS

Our acquisitions have impacted comparability of our financial results (see Note 3 of the Notes to Consolidated Financial Statements).

RESULTS OF OPERATIONS



The following tables and discussion are a summary of our results of operations
for the three and nine months ended September 30, 2020 and 2019, including a
reconciliation of Adjusted EBITDA and DCF from "Net income" and "Net cash
provided by operating activities," the most directly comparable GAAP financial
measures. Prior period financial information has been retrospectively adjusted
for common control transactions.

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                                 Three Months Ended September 30,             Nine Months Ended September 30,
(In millions)                     2020           2019       Variance         2020             2019        Variance
Total revenues and other
income(1)                    $      2,247     $  2,280     $     (33 )   $    5,320       $    6,725     $ (1,405 )
Costs and expenses:
Cost of revenues (excludes
items below)                          323          407           (84 )        1,006            1,099          (93 )
Purchased product costs               152          129            23            374              489         (115 )
Rental cost of sales                   33           37            (4 )          101              103           (2 )
Rental cost of sales -
related parties                        32           45           (13 )          119              124           (5 )
Purchases - related parties           297          303            (6 )          853              894          (41 )
Depreciation and
amortization                          346          302            44            992              916           76
Impairment expense                      -            -             -          2,165                -        2,165
General and administrative
expenses                               96          102            (6 )          289              293           (4 )
Restructuring expenses                 36            -            36             36                -           36
Other taxes                            33           29             4             94               84           10
Total costs and expenses            1,348        1,354            (6 )        6,029            4,002        2,027
Income/(loss) from
operations                            899          926           (27 )         (709 )          2,723       (3,432 )
Related party interest and
other financial costs                   -            5            (5 )            4                8           (4 )
Interest expense, net of
amounts capitalized                   207          212            (5 )          624              640          (16 )
Other financial costs                  17           16             1             49               38           11
Income/(loss) before income
taxes                                 675          693           (18 )       (1,386 )          2,037       (3,423 )
Provision for income taxes              1            4            (3 )            1                2           (1 )
Net income/(loss)                     674          689           (15 )       (1,387 )          2,035       (3,422 )
Less: Net income
attributable to
noncontrolling interests                9            8             1             24               20            4
Less: Net income
attributable to Predecessor             -           52           (52 )            -              401         (401 )
Net income/(loss)
attributable to MPLX LP               665          629            36         (1,411 )          1,614       (3,025 )

Adjusted EBITDA attributable
to MPLX LP (excluding
Predecessor results)(2)             1,335        1,165           170          3,856            3,015          841
Adjusted EBITDA attributable
to MPLX LP (including
Predecessor results)(3)               N/A        1,273           N/A            N/A            3,785          N/A
DCF attributable to GP and
LP unitholders (including
Predecessor results)(3)      $      1,032     $    997     $      35     $    3,075       $    2,963     $    112

(1) The nine months ended September 30, 2020 includes impairment expense of

approximately $1.3 billion related to three equity method investments.

(2) Non-GAAP measure. See reconciliation below to the most directly comparable

GAAP measures. Excludes adjusted EBITDA and DCF adjustments attributable to

Predecessor.

(3) Non-GAAP measure. See reconciliation below to the most directly comparable


    GAAP measures. Includes adjusted EBITDA and DCF adjustments attributable to
    Predecessor.





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                                    Three Months Ended September 30,               Nine Months Ended September 30,
(In millions)                     2020              2019         Variance          2020            2019        Variance
Reconciliation of Adjusted
EBITDA attributable to MPLX
LP and DCF attributable to
GP and LP unitholders from
Net income:
Net income/(loss)            $        674       $     689       $     (15 )   $    (1,387 )     $   2,035     $ (3,422 )
Provision for income taxes              1               4              (3 )             1               2           (1 )
Amortization of deferred
financing costs                        15              10               5              44              29           15
Gain on extinguishment of
debt                                  (14 )             -             (14 )           (14 )             -          (14 )
Net interest and other
financial costs                       223             223               -             647             657          (10 )
Income from operations                899             926             (27 )          (709 )         2,723       (3,432 )
Depreciation and
amortization                          346             302              44             992             916           76
Non-cash equity-based
compensation                            4               5              (1 )            12              17           (5 )
Impairment expense                      -               -               -           2,165               -        2,165
(Income)/loss from equity
method investments                    (83 )           (95 )            12           1,012            (255 )      1,267

Distributions/adjustments


related to equity method
investments                           130             145             (15 )           369             399          (30 )
Unrealized derivative
losses/(gains)(1)                      10             (11 )            21               1              (7 )          8
Restructuring expenses                 36               -              36              36               -           36
Acquisition costs                       -               9              (9 )             -              14          (14 )
Other                                   3               1               2               5               1            4
Adjusted EBITDA                     1,345           1,282              63           3,883           3,808           75
Adjusted EBITDA attributable
to noncontrolling interests           (10 )            (9 )            (1 )           (27 )           (23 )         (4 )
Adjusted EBITDA attributable
to Predecessor(2)                       -            (108 )           108               -            (770 )        770
Adjusted EBITDA attributable
to MPLX LP(3)                       1,335           1,165             170           3,856           3,015          841
Deferred revenue impacts               29              36              (7 )            92              67           25
Net interest and other
financial costs                      (223 )          (223 )             -            (647 )          (657 )         10
Maintenance capital
expenditures                          (41 )           (75 )            34            (108 )          (174 )         66
Maintenance capital
expenditures reimbursements            11              18              (7 )            31              34           (3 )
Equity method investment
capital expenditures paid
out                                    (5 )            (8 )             3             (16 )           (16 )          -
Restructuring expenses                (36 )             -             (36 )           (36 )             -          (36 )
Other                                  (3 )             6              (9 )             -              16          (16 )
Portion of DCF adjustments
attributable to
Predecessor(2)                          -              27             (27 )             -             159         (159 )
DCF                                 1,067             946             121           3,172           2,444          728
Preferred unit distributions          (35 )           (30 )            (5 )           (97 )           (92 )         (5 )
DCF attributable to GP and
LP unitholders                      1,032             916             116           3,075           2,352          723
Adjusted EBITDA attributable
to Predecessor(2)                       -             108            (108 )             -             770         (770 )
Portion of DCF adjustments
attributable to
Predecessor(2)                          -             (27 )            27               -            (159 )        159
DCF attributable to GP and
LP unitholders (including
Predecessor results)         $      1,032       $     997       $      35

$ 3,075 $ 2,963 $ 112

(1) MPLX makes a distinction between realized and unrealized gains and losses on

derivatives. During the period when a derivative contract is outstanding,

changes in the fair value of the derivative are recorded as an unrealized

gain or loss. When a derivative contract matures or is settled, the

previously recorded unrealized gain or loss is reversed and the realized gain


    or loss of the contract is recorded.



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(2) The adjusted EBITDA and DCF adjustments related to Predecessor are excluded

from adjusted EBITDA attributable to MPLX LP and DCF attributable to GP and

LP unitholders prior to the acquisition date.

(3) For the three months ended September 30, 2020, the L&S and G&P segments made

up $893 million and $442 million of Adjusted EBITDA attributable to MPLX LP,

respectively. For the three months ended September 30, 2019, the L&S and G&P

segments made up $766 million and $399 million of Adjusted EBITDA

attributable to MPLX LP, respectively. For the nine months ended

September 30, 2020, the L&S and G&P segments made up $2,604 million and

$1,252 million of Adjusted EBITDA attributable to MPLX LP, respectively. For

the nine months ended September 30, 2019, the L&S and G&P segments made up

$1,895 million and $1,120 million of Adjusted EBITDA attributable to MPLX LP,
    respectively.


                                                      Nine Months Ended September 30,
(In millions)                                    2020               2019            Variance
Reconciliation of Adjusted EBITDA
attributable to MPLX LP and DCF
attributable to GP and LP unitholders from
Net cash provided by operating activities:
Net cash provided by operating activities  $       3,336       $       2,990     $         346
Changes in working capital items                    (154 )               134              (288 )
All other, net                                        (6 )               (23 )              17
Non-cash equity-based compensation                    12                  17                (5 )
Net (loss)/gain on disposal of assets                 (1 )                 3                (4 )
Gain on extinguishment of debt                       (14 )                 -               (14 )
Net interest and other financial costs               647                 657               (10 )
Current income taxes                                   2                   1                 1
Asset retirement expenditures                          -                   1                (1 )
Unrealized derivative (gains)/losses(1)                1                  (7 )               8
Restructuring Expenses                                36                   -                36
Acquisition costs                                      -                  14               (14 )
Other adjustments to equity method
investment distributions                              19                  20                (1 )
Other                                                  5                   1                 4
Adjusted EBITDA                                    3,883               3,808                75
Adjusted EBITDA attributable to
noncontrolling interests                             (27 )               (23 )              (4 )
Adjusted EBITDA attributable to
Predecessor(2)                                         -                (770 )             770
Adjusted EBITDA attributable to MPLX LP(3)         3,856               3,015               841
Deferred revenue impacts                              92                  67                25
Net interest and other financial costs              (647 )              (657 )              10
Maintenance capital expenditures                    (108 )              (174 )              66
Maintenance capital expenditures
reimbursements                                        31                  34                (3 )
Equity method investment capital
expenditures paid out                                (16 )               (16 )               -
Restructuring Expenses                               (36 )                 -               (36 )
Other                                                  -                  16               (16 )
Portion of DCF adjustments attributable to
Predecessor(2)                                         -                 159              (159 )
DCF                                                3,172               2,444               728
Preferred unit distributions                         (97 )               (92 )              (5 )
DCF attributable to GP and LP unitholders          3,075               2,352               723
Adjusted EBITDA attributable to
Predecessor(2)                                         -                 770              (770 )
Portion of DCF adjustments attributable to
Predecessor(2)                                         -                (159 )             159
DCF attributable to GP and LP unitholders
(including Predecessor results)            $       3,075       $       

2,963 $ 112

(1) MPLX makes a distinction between realized and unrealized gains and losses on

derivatives. During the period when a derivative contract is outstanding,

changes in the fair value of the derivative are recorded as an unrealized

gain or loss. When a derivative contract matures or is settled, the

previously recorded unrealized gain or loss is reversed and the realized gain

or loss of the contract is recorded.

(2) The adjusted EBITDA and DCF adjustments related to Predecessor are excluded

from adjusted EBITDA attributable to MPLX LP and DCF attributable to GP and

LP unitholders prior to the acquisition date.

(3) For the nine months ended September 30, 2020, the L&S and G&P segments made

up $2,604 million and $1,252 million of Adjusted EBITDA attributable to MPLX

LP, respectively. For the nine months ended September 30, 2019, the L&S and

G&P segments made up $1,895 million and $1,120 million of Adjusted EBITDA


    attributable to MPLX LP, respectively.



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Three months ended September 30, 2020 compared to three months ended September 30, 2019



Total revenues and other income decreased $33 million in the third quarter of
2020 compared to the same period of 2019. This decrease was primarily due to
lower G&P fees from lower volumes in the Southwest and lower prices in the
Bakken and Rockies. This was partially offset by higher G&P fees from higher
volumes in the Rockies and higher prices in the Southwest, Marcellus and
Southern Appalachia. There were also decreases due to the Wholesale Exchange and
lower L&S pipeline, terminal and storage volumes, including decreased
throughputs on our Explorer and Bakken pipeline equity method investments. These
decreases were partially offset by favorable L&S rate impacts, increased volume
deficiency payments and favorable impacts from increased marine equipment.

Cost of Revenues decreased $84 million in the third quarter of 2020 compared to
the same period of 2019. This was primarily due to lower operating costs due to
lower throughput, lower project-related spend, the Wholesale Exchange as well as
other miscellaneous decreases.

Purchased product costs increased $23 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to an increase of
$20 million related to unrealized derivative gains in the prior year compared to
unrealized derivative losses in the current year and higher prices of $21
million in the Southwest, partially offset by lower volumes of $21 million in
the Southwest.

Rental cost of sales - related parties decreased $13 million in the third
quarter of 2020 compared to the same period of 2019. This was primarily due to
lower operating costs due to reduced throughput as well as decreased project
spend from overall cost reduction initiatives.

Purchases - related parties decreased $6 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to aligning various
expenses as a result of the ANDX acquisition as well as the Wholesale Exchange.

Depreciation and amortization expense increased $44 million in the third quarter
of 2020 compared to the same period of 2019. This was primarily due to
write-offs of assets under construction of $27 million related to idled MPC
refineries as well as property, plant and equipment placed in service in the
fourth quarter of 2019 and the first nine months of 2020.

General and administrative expenses decreased $6 million in the third quarter of
2020 compared to the same period of 2019. This was primarily due to decreased
employee costs from MPC as well as acquisition costs incurred in 2019.

Restructuring expenses increased $36 million in the third quarter of 2020 compared to the same period of 2019. This was due to cost cutting measures employed by MPC during the third quarter of 2020 which resulted in restructuring charges, some of which were allocated to MPLX based on impacted employees.



Net interest expense and other financial costs decreased $9 million in the third
quarter of 2020 compared to the same period of 2019. This was primarily due to
decreased interest on variable rate debt as a result of lower interest rates
during the quarter, as well as from the repayment of debt with higher interest
rates and the issuance of new senior notes at lower interest rates.

Nine months ended September 30, 2020 compared to nine months ended September 30, 2019



Total revenues and other income decreased $1,405 million in the first nine
months of 2020 compared to the same period of 2019. This was primarily driven by
our ownership in MarkWest Utica EMG, L.L.C. ("MarkWest Utica EMG"), our indirect
ownership in Ohio Gathering Company, L.L.C. through our investment in MarkWest
Utica EMG and our ownership in Uintah Basin Field Services, L.L.C., as we
recognized impairments related to these investments in the first quarter of 2020
in the amount of $1,264 million. Also contributing to the decrease was lower
fees from lower volumes in the Southwest and Rockies, and lower prices in all of
the G&P regions partially offset by increased volumes in the Marcellus. There
were also decreases due to lower L&S pipeline, terminal and storage volumes,
including decreased throughputs on our Explorer and Bakken pipeline equity
method investments which were offset by favorable L&S rate impacts, increased
volume deficiency payments and favorable impacts from increased marine
equipment.

Cost of Revenues decreased $93 million in the first nine months of 2020 compared
to the same period of 2019, primarily due to lower project-related costs, which
include repairs, maintenance and operating costs in the L&S and G&P segments, as
well as from the Wholesale Exchange.


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Purchased product costs decreased $115 million in the first nine months of 2020
compared to the same period of 2019. This was primarily due to lower prices of
$73 million in the Southwest and Southern Appalachia and $52 million from lower
volumes in the Southwest. This was offset by an increase of $8 million due to
unrealized derivative gains in the prior year compared to unrealized derivative
losses in the current year.

Purchases - related parties decreased $41 million in the first nine months of
2020 compared to the same period of 2019. This was primarily due to aligning
various expenses as a result of the ANDX acquisition, lower product purchases
from MPC attributable to the Wholesale Exchange, lower project spend and
decreased other miscellaneous costs from MPC.

Depreciation and amortization expense increased $76 million in the first nine
months of 2020 compared to the same period of 2019. This was primarily due to
property, plant and equipment placed in service in the fourth quarter of 2019
and the first nine months of 2020 as well as write-offs of assets under
construction of $27 million related to idled MPC refineries.

Impairment expense increased $2,165 million in the first nine months of 2020
compared to the same period of 2019. During the first quarter of 2020 we
recorded impairment expense for goodwill, intangible assets and property, plant
and equipment of $1,814 million, $177 million and $174 million, respectively.
The impairment of goodwill related to our Eastern G&P reporting unit while the
intangible asset and property, plant and equipment impairments relate to certain
assets in our Southwest region. The impairments were primarily driven by the
slowing of drilling activity, which has reduced production growth forecasts from
our producer customers.

Restructuring expenses increased $36 million in the first nine months of 2020
compared to the same period of 2019. This was due to cost cutting measures
employed by MPC during the third quarter of 2020 which resulted in restructuring
charges, some of which were allocated to MPLX based on impacted employees.

Other taxes increased $10 million in the first nine months of 2020 compared to
the same period of 2019 primarily due to refunds and credits related to prior
periods.

Net interest expense and other financial costs decreased $9 million in the first
nine months of 2020 compared to the same period of 2019. This was primarily due
to decreased interest on variable rate debt as a result of lower interest rates
during the year, as well as from the repayment of debt with higher interest
rates and the issuance of new senior notes at lower interest rates.

SEGMENT RESULTS



We classify our business in the following reportable segments: L&S and G&P.
Segment Adjusted EBITDA represents Adjusted EBITDA attributable to the
reportable segments. Amounts included in net income and excluded from Segment
Adjusted EBITDA include: (i) depreciation and amortization; (ii)
provision/(benefit) for income taxes; (iii) amortization of deferred financing
costs; (iv) extinguishment of debt; (v) non-cash equity-based compensation; (vi)
impairment expense; (vii) net interest and other financial costs; (viii)
income/(loss) from equity method investments; (ix) distributions and adjustments
related to equity method investments; (x) unrealized derivative gains/(losses);
(xi) acquisition costs; (xii) noncontrolling interests; and (xiii) other
adjustments as deemed necessary. These items are either: (i) believed to be
non-recurring in nature; (ii) not believed to be allocable or controlled by the
segment; or (iii) not tied to the operational performance of the segment.

The tables below present information about Segment Adjusted EBITDA for the
reported segments for the three and nine months ended September 30, 2020 and
2019. Prior period financial information has been retrospectively adjusted for
common control transactions.


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L&S Segment


                  [[Image Removed: q3lssegmenthighlights.jpg]]

(1) Includes adjusted EBITDA attributable to Predecessor.




                                  Three Months Ended September 30,                Nine Months Ended September 30,
(In millions)                    2020            2019         Variance          2020             2019         Variance
Service revenue              $     989       $     976       $      13     $     2,924       $     2,787     $     137
Rental income                      249             304             (55 )           737               935          (198 )
Product related revenue              9              22             (13 )            49                57            (8 )
Income from equity method
investments                         36              60             (24 )           126               159           (33 )
Other income                        51              17              34             154                45           109
Total segment revenues and
other income                     1,334           1,379             (45 )         3,990             3,983             7
Cost of revenues                   173             262             (89 )           601               707          (106 )
Purchases - related parties        219             216               3             629               633            (4 )
Depreciation and
amortization                       164             113              51             440               373            67
General and administrative
expenses                            55              59              (4 )           159               152             7
Restructuring expenses              27               -              27              27                 -            27
Other taxes                         19              16               3              53                43            10
Segment income from
operations                         677             713             (36 )         2,081             2,075             6
Depreciation and
amortization                       164             113              51             440               373            67
Income from equity method
investments                        (36 )           (60 )            24            (126 )            (159 )          33

Distributions/adjustments


related to equity method
investments                         55              70             (15 )           169               184           (15 )
Restructuring expenses              27               -              27              27                 -            27
Acquisition costs                    -               9              (9 )             -                14           (14 )
Non-cash equity-based
compensation                         3               3               -               8                10            (2 )
Other                                3               1               2               5                 1             4
Adjusted EBITDA attributable
to Predecessor                       -             (83 )            83               -              (603 )         603
Segment adjusted EBITDA(1)         893             766             127           2,604             1,895           709

Capital expenditures               118             272            (154 )           410               700          (290 )

Investments in unconsolidated affiliates $ 4 $ 95 $ (91 ) $ 132 $ 163 $ (31 )

(1) See the Reconciliation of Adjusted EBITDA attributable to MPLX LP and DCF


    attributable to GP and LP unitholders from Net income table for the
    reconciliation to the most directly comparable GAAP measure.


Three months ended September 30, 2020 compared to three months ended September 30, 2019



Service revenue increased $13 million in the third quarter of 2020 compared to
the same period of 2019. This was primarily due to a $21 million increase due to
the reclassification of lease income between service revenue, rental income and
other income based on modifications to lease contracts, a $10 million increase
from additional marine equipment, an increase in

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volume deficiency payments, favorable price impacts and other miscellaneous items. These increases were partially offset by reduced pipeline and storage volumes and an $8 million decrease due to the Wholesale Exchange.



Rental income decreased $55 million in the third quarter of 2020 compared to the
same period of 2019. This was primarily due to a decrease of $55 million due to
the reclassification of lease income between service revenue, rental income and
other income based on modifications to lease contracts.

Product related revenue decreased $13 million in the third quarter of 2020 compared to the same period of 2019. This was primarily due to the Wholesale Exchange.



Income from equity method investments decreased $24 million in the third quarter
of 2020 compared to the same period of 2019. This was primarily due to decreased
throughput on the Explorer and Bakken pipelines during 2020.

Other income increased $34 million in the third quarter of 2020 compared to the
same period of 2019. This was primarily due to the reclassification of lease
income between service revenue, rental income and other income based on
modifications to lease contracts.

Cost of revenues decreased $89 million in the third quarter of 2020 compared to
the same period of 2019. This was primarily due to lower operating costs due to
lower throughput, lower project-related spend, the Wholesale Exchange as well as
other miscellaneous expense decreases.

Depreciation and amortization increased $51 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to write-offs of
assets under construction of $27 million related to idled MPC refineries as well
as property, plant and equipment placed in service in the fourth quarter of 2019
and the first nine months of 2020.

Restructuring expenses increased $27 million in the third quarter of 2020 compared to the same period of 2019. This was due to cost cutting measures employed by MPC during the third quarter of 2020 which resulted in restructuring charges, some of which were allocated to MPLX based on impacted employees.

Nine months ended September 30, 2020 compared to nine months ended September 30, 2019



Service revenue increased $137 million in the first nine months of 2020 compared
to the same period of 2019. This was primarily due to a $104 million increase
due to the reclassification of lease income between service revenue, rental
income and other income based on modifications to lease contracts and a $35
million increase from additional marine equipment. There were also increases
related to volume deficiency payments and favorable price impacts partially
offset by unfavorable volume impacts and an $8 million decrease due to the
Wholesale Exchange.

Rental income decreased $198 million in the first nine months of 2020 compared
to the same period of 2019. This was primarily due to a decrease of $214 million
due to the reclassification of lease income between service revenue, rental
income and other income based on modifications to lease contracts. The decrease
was partially offset by increased terminal storage revenue as well as other
miscellaneous increases.

Product related revenue decreased $8 million in the first nine months of 2020
compared to the same period of 2019. This was primarily due to the Wholesale
Exchange.

Income from equity method investments decreased $33 million in the first nine
months of 2020 compared to the same period of 2019. This was primarily due to
decreased throughput on the Explorer and Bakken pipelines during 2020.

Other income increased $109 million in the first nine months of 2020 compared to
the same period of 2019. This was primarily due to the reclassification of lease
income between service revenue, rental income and other income based on
modifications to lease contracts.

Cost of revenues decreased $106 million in the first nine months of 2020
compared to the same period of 2019. This was primarily due to lower operating
costs due to lower throughput, lower project-related spend, a decrease of $7
million from the Wholesale Exchange as well as other miscellaneous expense
decreases.

Depreciation and amortization increased $67 million in the first nine months of
2020 compared to the same period of 2019. This was primarily due to property,
plant and equipment placed in service in the fourth quarter of 2019 and the
first nine months of 2020 as well as write-offs of assets under construction of
$27 million related to idled MPC refineries.

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General and administrative expenses increased $7 million in the first nine months of 2020 compared to the same period of 2019. This was primarily due to increased employee costs from MPC, partially offset by a decrease due to transaction costs incurred in 2019 related to the ANDX acquisition.



Restructuring expenses increased $27 million in the first nine months of 2020
compared to the same period of 2019. This was due to cost cutting measures
employed by MPC during the third quarter of 2020 which resulted in restructuring
charges, some of which were allocated to MPLX based on impacted employees.

Other taxes increased $10 million in the first nine months of 2020 compared to
the same period of 2019. This was primarily due to refunds and credits related
to prior periods.

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G&P Segment


                  [[Image Removed: q3gpsegmenthighlights.jpg]]

(1) Includes adjusted EBITDA attributable to Predecessor.




                                  Three Months Ended September 30,                Nine Months Ended September 30,
(In millions)                    2020            2019         Variance          2020             2019         Variance
Service revenue              $     524       $     555       $     (31 )   $     1,549       $     1,627     $     (78 )
Rental income                       94              88               6             271               260            11
Product related revenue            234             207              27             607               714          (107 )
Income/(loss) from equity
method investments                  47              35              12          (1,138 )              96        (1,234 )
Other income                        14              16              (2 )            41                45            (4 )
Total segment revenues and
other income                       913             901              12           1,330             2,742        (1,412 )
Cost of revenues                   215             227             (12 )           625               619             6
Purchased product costs            152             129              23             374               489          (115 )
Purchases - related parties         78              87              (9 )           224               261           (37 )
Depreciation and
amortization                       182             189              (7 )           552               543             9
Impairment expense                   -               -               -           2,165                 -         2,165
General and administrative
expenses                            41              43              (2 )           130               141           (11 )
Restructuring expenses               9               -               9               9                 -             9
Other taxes                         14              13               1              41                41             -
Segment income/(loss) from
operations                         222             213               9          (2,790 )             648        (3,438 )
Depreciation and
amortization                       182             189              (7 )           552               543             9
Impairment expense                   -               -               -           2,165                 -         2,165
(Income)/loss from equity
method investments                 (47 )           (35 )           (12 )         1,138               (96 )       1,234

Distributions/adjustments


related to equity method
investments                         75              75               -             200               215           (15 )
Restructuring expenses               9               -               9               9                 -             9
Unrealized derivative
losses/(gains)(1)                   10             (11 )            21               1                (7 )           8
Non-cash equity-based
compensation                         1               2              (1 )             4                 7            (3 )
Adjusted EBITDA attributable
to Predecessor                       -             (25 )            25               -              (167 )         167
Adjusted EBITDA attributable
to noncontrolling interests        (10 )            (9 )            (1 )           (27 )             (23 )          (4 )
Segment Adjusted EBITDA(2)         442             399              43           1,252             1,120           132

Capital expenditures               131             321            (190 )           375               953          (578 )

Investments in unconsolidated affiliates $ 18 $ 76 $ (58 ) $ 112 $ 331 $ (219 )

(1) MPLX makes a distinction between realized and unrealized gains and losses on

derivatives. During the period when a derivative contract is outstanding,

changes in the fair value of the derivative are recorded as an unrealized

gain or loss. When a derivative contract matures or is settled, the

previously recorded unrealized gain or loss is reversed and the realized gain


    or loss of the contract is recorded.



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(2) See the Reconciliation of Adjusted EBITDA attributable to MPLX LP and DCF


    attributable to GP and LP unitholders from Net income table for the
    reconciliation to the most directly comparable GAAP measure.


Three months ended September 30, 2020 compared to three months ended September 30, 2019



Service revenue decreased $31 million in the third quarter of 2020 compared to
the same period of 2019. This was primarily due to lower fees from lower volumes
in the Southwest and Rockies of $22 million, a decrease from lower prices in the
Bakken and Rockies of $6 million as well as other miscellaneous decreases.

Rental income increased $6 million in the third quarter of 2020 compared to the
same period of 2019. This was primarily due to higher fees related to gathering
contracts in the Marcellus.

Product related revenue increased $27 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to higher prices in
the Southwest, Marcellus and Southern Appalachia of approximately $23 million
and higher volumes in the Rockies of $21 million, partially offset by and lower
volumes in the Southwest of $15 million and lower prices in the Rockies and
Bakken of $11 million, as well as other miscellaneous increases.

Income from equity method investments increased $12 million in the third quarter
of 2020 compared to the same period of 2019. This increase was due to lower
basis differential amortization related to MarkWest Utica EMG as a result of
impairments recorded in the first quarter of 2020 and an increase from the
Sherwood Midstream LLC joint venture due to additional plants coming online
during the second half of 2019.

Cost of revenues decreased $12 million in the third quarter of 2020 compared to the same period of 2019. This decrease is attributable to lower repairs, maintenance and operating costs in the Southwest and Marcellus.



Purchased product costs increased $23 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to an increase of
$20 million related to unrealized derivative gains in the prior year compared to
unrealized derivative losses in the current year and higher prices of $21
million in the Southwest, partially offset by lower volumes of $21 million in
the Southwest.

Purchases - related parties decreased $9 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to aligning various
expenses as a result of the ANDX acquisition.

Depreciation and amortization decreased $7 million in the third quarter of 2020
compared to the same period of 2019. This was primarily due to the impairment of
intangible assets and property, plant and equipment during the first quarter of
2020 which has resulted in less depreciation expense in the current period when
compared to prior periods.

Restructuring expenses increased $9 million in the third quarter of 2020 compared to the same period of 2019. This was due to cost cutting measures employed by MPC during the third quarter of 2020 which resulted in restructuring charges, some of which were allocated to MPLX based on impacted employees.

Nine months ended September 30, 2020 compared to nine months ended September 30, 2019

Service revenue decreased $78 million in the first nine months of 2020 compared to the same period of 2019. This was primarily due to lower fees from lower volumes in the Rockies and Southwest of $40 million as well as other miscellaneous decreases.

Rental income increased $11 million in the first nine months of 2020 compared to the same period of 2019. This was primarily due to higher fees related to gathering contracts in the Marcellus.



Product related revenue decreased $107 million in the first nine months
of 2020 compared to the same period of 2019. This was primarily due to lower
prices in all of the G&P regions of approximately $154 million and lower volumes
of $42 million in the Southwest. This was partially offset by $42 million of
volume increases in the Marcellus, Rockies and the Javelina plant in the
Southwest (this plant experienced downtime for maintenance in 2019), as well as
other miscellaneous increases.

Income from equity method investments decreased $1,234 million in the first nine
months of 2020 compared to the same period of 2019. The large decrease was
driven by our ownership in MarkWest Utica EMG, our indirect ownership in Ohio
Gathering Company, L.L.C. through our investment in MarkWest Utica EMG and our
ownership in Uintah Basin Field Services, L.L.C., as we recognized impairments
related to these investments in the first quarter of 2020 in the amount of
$1,264

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million. This was partially offset by an increase in the Sherwood Midstream LLC
joint venture due to additional plants coming online during the second half of
2019.

Cost of revenues increased $6 million in the first nine months of 2020 compared
to the same period of 2019. The majority of the increase is attributable to
aligning various expenses as a result of the ANDX acquisition offset by lower
repairs, maintenance and operating costs in the Southwest, Southern Appalachia
and Marcellus.

Purchased product costs decreased $115 million in the first nine months
of 2020 compared to the same period of 2019. This was primarily due to lower
prices of $73 million in the Southwest and Southern Appalachia and $52 million
from lower volumes in the Southwest. This was offset by an increase of $8
million due to unrealized derivative gains in the prior year compared to
unrealized derivative losses in the current year.

Purchases - related parties decreased $37 million in the first nine months of 2020 compared to the same period of 2019. This decrease is primarily attributable to aligning various expenses as a result of the ANDX acquisition.



Depreciation and amortization increased $9 million in the first nine months
of 2020 compared to the same period of 2019 primarily due to property, plant and
equipment placed in service in the fourth quarter of 2019 and the first nine
months of 2020 partially offset by the impairment of intangible assets and
property, plant and equipment during the first quarter of 2020 which has
resulted in less depreciation expense in the current period when compared to
prior periods.

Impairment expense increased $2,165 million in the first nine months of 2020
compared to the same period of 2019. During the first quarter of 2020 we
recorded impairment expense for goodwill, intangible assets and property, plant
and equipment of $1,814 million, $177 million and $174 million, respectively.
The impairment of goodwill related to our Eastern G&P reporting unit while the
intangible asset and property, plant and equipment impairments relate to certain
assets in our Southwest region. The impairments were primarily driven by the
slowing of drilling activity, which has reduced production growth forecasts from
our producer customers.

General and administrative expenses decreased $11 million in the first nine months of 2020 compared to the same period of 2019 due to lower employee related costs.



Restructuring expenses increased $9 million in the first nine months of 2020
compared to the same period of 2019. This was due to cost cutting measures
employed by MPC during the third quarter of 2020 which resulted in restructuring
charges, some of which were allocated to MPLX based on impacted employees.

SEASONALITY



The volume of crude oil and refined products transported and stored utilizing
our assets is directly affected by the level of supply and demand for crude oil
and refined products in the markets served directly or indirectly by our assets.
Many effects of seasonality on the L&S segment's revenues are mitigated through
the use of our fee-based transportation and storage services agreements with MPC
that include minimum volume commitments.

Our G&P segment can be affected by seasonal fluctuations in the demand for
natural gas and NGLs and the related fluctuations in commodity prices caused by
various factors including variations in weather patterns from year to year. We
are able to manage the seasonality impacts through the execution of our
marketing strategy and via our storage capabilities. Overall, our exposure to
seasonality fluctuations is minimal.


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OPERATING DATA(1)


                 [[Image Removed: q3lspipelinethroughput.jpg]]

                                    Three Months Ended                  Nine Months Ended
                                        September 30,                      September 30,
                                   2020              2019             2020              2019
L&S
Pipeline throughput (mbpd)
Crude oil pipelines                   3,077            3,367             3,007            3,240
Product pipelines                     1,613            1,859             1,701            1,875
Total pipelines                       4,690            5,226             4,708            5,115

Average tariff rates ($ per
barrel)(2)
Crude oil pipelines           $        0.96     $       0.97     $        0.96     $       0.94
Product pipelines                      0.85             0.77              0.82             0.73
Total pipelines               $        0.93     $       0.90     $        0.91     $       0.86

Terminal throughput (mbpd)            2,701            3,292             2,696            3,267

Marine Assets (number in
operation)(3)
Barges                                  301              264               301              264
Towboats                                 23               23                23               23



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[[Image Removed: q3gpgatheringthroughput.jpg]][[Image Removed: q3gpprocessinghtroughput.jpg]][[Image Removed: q3gpfractionationthroughput.jpg]]


                                        Three Months Ended              Three Months Ended
                                         September 30, 2020              September 30, 2019
                                                      MPLX LP                         MPLX LP
                                    MPLX LP(4)      Operated(5)     MPLX LP(4)      Operated(5)
G&P
Gathering Throughput (MMcf/d)
Marcellus Operations                     1,312           1,312           1,271           1,271
Utica Operations                             -           1,816               -           2,381
Southwest Operations                     1,413           1,479           1,653           1,653
Bakken Operations                          130             130             149             149
Rockies Operations                         481             659             627             827
Total gathering throughput               3,336           5,396           3,700           6,281

Natural Gas Processed (MMcf/d)
Marcellus Operations                     4,222           5,706           4,264           5,300
Utica Operations                             -             530               -             866
Southwest Operations                     1,377           1,439           1,667           1,667
Southern Appalachian Operations            227             227             254             254
Bakken Operations                          129             129             149             149
Rockies Operations                         481             481             568             568
Total natural gas processed              6,436           8,512           6,902           8,804

C2 + NGLs Fractionated (mbpd)
Marcellus Operations(6)                    477             477             433             433
Utica Operations(6)                          -              30               -              49
Southwest Operations                        21              21              19              19
Southern Appalachian Operations(7)          11              11              13              13
Bakken Operations                           25              25              29              29
Rockies Operations                           3               3               4               4
Total C2 + NGLs fractionated(8)            537             567             498             547



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                                        Nine Months Ended               Nine Months Ended
                                         September 30, 2020              September 30, 2019
                                                      MPLX LP                         MPLX LP
                                    MPLX LP(4)      Operated(5)     MPLX LP(4)      Operated(5)
G&P
Gathering Throughput (MMcf/d)
Marcellus Operations                     1,372           1,372           1,273           1,273
Utica Operations                             -           1,840               -           2,186
Southwest Operations                     1,445           1,491           1,618           1,618
Bakken Operations                          137             137             149             149
Rockies Operations                         523             706             639             835
Total gathering throughput               3,477           5,546           3,679           6,061

Natural Gas Processed (MMcf/d)
Marcellus Operations                     4,177           5,582           4,211           5,218
Utica Operations                             -             587               -             835
Southwest Operations                     1,479           1,543           1,608           1,608
Southern Appalachian Operations            231             231             244             244
Bakken Operations                          137             137             149             149
Rockies Operations                         512             512             575             575
Total natural gas processed              6,536           8,592           6,787           8,629

C2 + NGLs Fractionated (mbpd)
Marcellus Operations(6)                    466             466             431             431
Utica Operations(6)                          -              32               -              45
Southwest Operations                        16              16              13              13
Southern Appalachian Operations(7)          12              12              12              12
Bakken Operations                           25              25              22              22
Rockies Operations                           4               4               4               4
Total C2 + NGLs fractionated(8)            523             555             482             527


                                         Three Months Ended                  Nine Months Ended
                                             September 30,                      September 30,
                                        2020              2019             2020              2019
Pricing Information
Natural Gas NYMEX HH ($ per MMBtu) $        2.13     $       2.33     $        1.92     $       2.57
C2 + NGL Pricing ($ per gallon)(9) $        0.45     $       0.44     $     

0.40 $ 0.53

(1) Operating data is inclusive of operating data for ANDX.

(2) Average tariff rates calculated using pipeline transportation revenues

divided by pipeline throughput barrels.

(3) Represents total at end of period.

(4) This column represents operating data for entities that have been

consolidated into the MPLX financial statements.

(5) This column represents operating data for entities that have been

consolidated into the MPLX financial statements as well as operating data for

MPLX-operated equity method investments.

(6) Hopedale is jointly owned by Ohio Fractionation and MarkWest Utica EMG. Ohio

Fractionation is a subsidiary of MarkWest Liberty Midstream. MarkWest Liberty

Midstream and MarkWest Utica EMG are entities that operate in the Marcellus

and Utica regions, respectively. Marcellus Operations includes Ohio

Fractionation's portion utilized of the jointly owned Hopedale Fractionation

Complex. Utica Operations includes MarkWest Utica EMG's portion utilized of

the jointly owned Hopedale Fractionation Complex. Additionally, Sherwood

Midstream has the right to fractionation revenue and the obligation to pay


    expenses related to 40 mbpd of capacity in the Hopedale 3 and Hopedale 4
    fractionators.

(7) Includes NGLs fractionated for the Marcellus Operations and Utica Operations.

(8) Purity ethane makes up approximately 193 mbpd and 182 mbpd of total MPLX

Operated, fractionated products for the three months ended September 30, 2020

and 2019, respectively, and approximately 192 mbpd and 189 mbpd of total

fractionated products for the nine months ended September 30, 2020 and 2019,

respectively. Purity ethane makes up approximately 188 mbpd and 172 mbpd of

total MPLX LP consolidated, fractionated products for the three months ended

September 30, 2020 and 2019, respectively, and approximately 186 mbpd and 179

mbpd of total fractionated products for the nine months ended September 30,

2020 and 2019, respectively.

(9) C2 + NGL pricing based on Mont Belvieu prices assuming an NGL barrel of

approximately 35 percent ethane, 35 percent propane, six percent Iso-Butane,


    12 percent normal butane and 12 percent natural gasoline.



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LIQUIDITY AND CAPITAL RESOURCES

Cash Flows



Our cash and cash equivalents were $28 million at September 30, 2020 and $15
million at December 31, 2019. The change in cash, cash equivalents and
restricted cash was due to the factors discussed below. Net cash provided by
(used in) operating activities, investing activities and financing activities
were as follows:
                                     Nine Months Ended September 30,
(In millions)                          2020                   2019
Net cash provided by (used in):
Operating activities            $         3,336         $         2,990
Investing activities                     (1,060 )                (2,189 )
Financing activities                     (2,263 )                  (845 )
Total                           $            13         $           (44 )



Net cash provided by operating activities increased $346 million in the first
nine months of 2020 compared to the first nine months of 2019, primarily due net
income adjusted for non-cash items.

Net cash used in investing activities decreased $1,129 million in the first nine
months of 2020 compared to the first nine months of 2019, primarily due to
decreased spending related to the capital budget, a return of capital from our
investments in Wink to Webster and Whistler and decreased contributions to
equity method investments.

Financing activities were a $2,263 million use of cash in the first nine months
of 2020 compared to an $845 million use of cash in the first nine months of
2019. The primary reason for the increase in the use of cash was due to lower
net borrowings in the current year for third party obligations as well as net
repayments on the MPC Loan Agreement in the current year compared to net
borrowing in the prior year.

Debt and Liquidity Overview



On August 18, 2020, MPLX issued $3 billion aggregate principal amount of new
senior notes consisting of $1.5 billion aggregate principal amount of 1.750
percent senior notes due March 2026 and $1.5 billion aggregate principal amount
of 2.650 percent senior notes due August 2030. The net proceeds were used to
repay the $1.0 billion of outstanding borrowings under the MPLX Term Loan
Agreement, to repay the $1.0 billion floating rate notes due September 2021, to
redeem all of the $450 million aggregate principal amount of 6.375 percent
senior notes due May 2024, to reduce amounts outstanding under the MPLX Credit
Agreement at the time and to redeem the $300 million aggregate principal amount
of 6.250 percent senior notes due October 15, 2022 (these notes were redeemed on
October 15, 2020).

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Our outstanding borrowings at September 30, 2020 consist of the following: (In millions)

                            September 30, 2020     December 31, 2019
MPLX LP:
Bank revolving credit facility          $               95     $               -
Term loan facility                                       -                 1,000
Floating rate senior notes                           1,000                 2,000
Fixed rate senior notes                             19,506                16,887
Consolidated subsidiaries:
MarkWest                                                23                    23
ANDX                                                   121                   190
Financing lease obligations                             12                    19
Total                                               20,757                20,119
Unamortized debt issuance costs                       (118 )                (106 )
Unamortized discount/premium                          (290 )                (300 )
Amounts due within one year                           (307 )                  (9 )
Total long-term debt due after one year $           20,042     $          

19,704





Our intention is to maintain an investment grade credit profile. As of
September 30, 2020, the credit ratings on our senior unsecured debt were at or
above investment grade level as follows:
Rating Agency       Rating
Moody's             Baa2 (negative outlook)
Standard & Poor's   BBB (negative outlook)
Fitch               BBB (negative outlook)



The ratings reflect the respective views of the rating agencies. Although it is
our intention to maintain a credit profile that supports an investment grade
rating, there is no assurance that these ratings will continue for any given
period of time. The ratings may be revised or withdrawn entirely by the rating
agencies if, in their respective judgments, circumstances so warrant.

The MPLX Credit Agreement and Term Loan Agreement contain certain
representations and warranties, affirmative and restrictive covenants and events
of default that we consider to be usual and customary for an agreement of this
type. The financial covenant requires MPLX to maintain a ratio of Consolidated
Total Debt as of the end of each fiscal quarter to Consolidated EBITDA (both as
defined in the MPLX Credit Agreement) for the prior four fiscal quarters of no
greater than 5.0 to 1.0 (or 5.5 to 1.0 during the six-month period following
certain acquisitions). Consolidated EBITDA is subject to adjustments for certain
acquisitions completed and capital projects undertaken during the relevant
period. Other covenants restrict us and/or certain of our subsidiaries from
incurring debt, creating liens on assets and entering into transactions with
affiliates. As of September 30, 2020, we were in compliance with the covenants,
including the financial covenant with a ratio of Consolidated Total Debt to
Consolidated EBITDA of 3.9 to 1.0.

The agreements governing our debt obligations do not contain credit rating
triggers that would result in the acceleration of interest, principal or other
payments solely in the event that our credit ratings are downgraded. However,
any downgrades in the credit ratings of our senior unsecured debt ratings to
below investment grade ratings could, among other things, increase the
applicable interest rates and other fees payable under the MPLX Credit Agreement
and may limit our ability to obtain future financing, including refinancing
existing indebtedness.


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Our liquidity totaled $4.9 billion at September 30, 2020 consisting of:


                                                                  September 30, 2020
                                                                                                Available
(In millions)                                Total Capacity       Outstanding Borrowings        Capacity
Bank revolving credit facility due 2024(1) $          3,500     $                (95 )       $       3,405
MPC Loan Agreement                                    1,500                        -                 1,500
Total liquidity                            $          5,000     $                (95 )               4,905
Cash and cash equivalents                                                                               28
Total liquidity                                                                              $       4,933

(1) Outstanding borrowings include less than $1 million in letters of credit

outstanding under this facility.





We expect our ongoing sources of liquidity to include cash generated from
operations and borrowings under the MPC Loan Agreement, the MPLX Credit
Agreement and access to capital markets. We believe that cash generated from
these sources will be sufficient to meet our short-term and long-term funding
requirements, including working capital requirements, capital expenditure
requirements, contractual obligations, and quarterly cash distributions. MPC
manages our cash and cash equivalents on our behalf directly with third-party
institutions as part of the treasury services that it provides to us under our
omnibus agreement. From time to time, we may also consider utilizing other
sources of liquidity, including the formation of joint ventures or sales of
non-strategic assets.

Equity and Preferred Units Overview



On July 31, 2020, MPLX completed the exchange of Western Refining Wholesale, LLC
to Western Refining Southwest, Inc. ("WRSW"), a wholly owned subsidiary of MPC,
in exchange for the redemption of 18,582,088 MPLX common units held by WRSW,
valued at $340 million.

Common units

The table below summarizes the changes in the number of units outstanding
through September 30, 2020:
(In units)
Balance at December 31, 2019         1,058,355,471
Unit-based compensation awards             395,091

Units redeemed in Wholesale Exchange (18,582,088 ) Balance at September 30, 2020 1,040,168,474

ATM



MPLX expects the net proceeds, if any, from sales under our ATM Program will be
used for general business purposes including repayment or refinancing of debt
and funding for acquisitions, working capital requirements and capital
expenditures. During the nine months ended September 30, 2020, we issued no
common units under our ATM program. As of September 30, 2020, $1.7 billion of
common units remain available for issuance through the ATM Program.

Distributions



We intend to pay a minimum quarterly distribution to the holders of our common
units of $0.2625 per unit, or $1.05 per unit on an annualized basis, to the
extent we have sufficient cash from our operations after the establishment of
cash reserves and the payment of costs and expenses, including reimbursements of
expenses to our general partner. The amount of distributions paid under our
policy and the decision to make any distributions is determined by our general
partner, taking into consideration the terms of our partnership agreement. Such
minimum distribution would equate to $273 million per quarter, or $1,092 million
per year, based on the number of common units outstanding at September 30, 2020.
On October 27, 2020, we announced the board of directors of our general partner
had declared a distribution of $0.6875 per unit that will be paid on
November 13, 2020 to unitholders of record on November 6, 2020. This is
consistent with the second quarter 2020 distribution of $0.6875 per unit and an
increase of 1.5 percent over the third quarter 2019 distribution. This rate will
also be received by Series A preferred unitholders. Although our partnership
agreement requires that we distribute all of our available cash each quarter, we
do not otherwise have a legal obligation to distribute any particular amount per
common unit.


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Series B preferred unitholders are entitled to receive a fixed distribution of
$68.75 per unit, per annum, payable semi-annually in arrears on February 15 and
August 15, or the first business day thereafter, up to and including February
15, 2023. After February 15, 2023, the holders of Series B preferred units are
entitled to receive cumulative, quarterly distributions payable in arrears on
the 15th day of February, May, August and November of each year, or the first
business day thereafter, based on a floating annual rate equal to the
three-month LIBOR plus 4.652 percent, in each case assuming a distribution is
declared by the Board of Directors. Accordingly, a cash distribution payment
totaling $21 million was paid to Series B unitholders on August 17, 2020.

TexNew Mex units are entitled to receive quarterly distribution payments in an
amount calculated using the distributable cash flow generated by a particular
portion of the TexNew Mex pipeline system, in excess of a base amount and
adjusted for previously agreed upon stipulations and contingencies.
Distributions earned by TexNew Mex units during the fourth quarter of 2019 and
during the six months ended June 30, 2020 were immaterial. Distributions of $5
million were earned by TexNew Mex units during the three months ended September
30, 2020.

The allocation of total quarterly cash distributions is as follows for the three
and nine months ended September 30, 2020 and 2019. MPLX's distributions are
declared subsequent to quarter end; therefore, the following table represents
total cash distributions applicable to the period in which the distributions
were earned.
                                Three Months Ended September 30,       Nine Months Ended September 30,
(In millions, except per unit
data)                                2020                2019               2020                2019
Distribution declared:
Limited partner units -
public                        $             270     $        266     $             810     $        718
Limited partner units - MPC                 445              438                 1,348            1,201
Total LP distribution
declared                                    715              704                 2,158            1,919
Series A preferred units                     20               20                    61               61
Series B preferred units                     10               10                    31               31
Total distribution declared                 745              734                 2,250            2,011

Cash distributions declared
per limited partner common
unit                          $          0.6875     $     0.6775     $          2.0625     $     2.0025



Capital Expenditures

Our operations are capital intensive, requiring investments to expand, upgrade,
enhance or maintain existing operations and to meet environmental and
operational regulations. Our capital requirements consist of maintenance capital
expenditures and growth capital expenditures. Examples of maintenance capital
expenditures are those made to replace partially or fully depreciated assets, to
maintain the existing operating capacity of our assets and to extend their
useful lives, or other capital expenditures that are incurred in maintaining
existing system volumes and related cash flows. In contrast, growth capital
expenditures are those incurred for capital improvements that we expect will
increase our operating capacity to increase volumes gathered, processed,
transported or fractionated, decrease operating expenses within our facilities
or increase operating income over the long term. Examples of growth capital
expenditures include the acquisition of equipment or the construction costs
associated with new well connections, and the development of additional
pipeline, processing or storage capacity. In general, growth capital includes
costs that are expected to generate additional or new cash flow for MPLX.


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Our capital expenditures are shown in the table below:


                                                             Nine Months Ended September 30,
(In millions)                                                  2020                   2019
Capital expenditures:
Maintenance                                             $           108         $           174
Maintenance reimbursements                                          (31 )                   (34 )
Growth                                                              677                   1,479
Growth reimbursements                                                (2 )                   (17 )
Total capital expenditures                                          752                   1,602
Less: (Decrease)/increase in capital accruals                      (197 )                   (67 )
Asset retirement expenditures                                         -                       1

Additions to property, plant and equipment, net of reimbursements(1)

                                                   949                   1,668
Investments in unconsolidated affiliates                            244                     494
Acquisitions                                                          -                      (6 )
Total capital expenditures and acquisitions                       1,193                   2,156
Less: Maintenance capital expenditures (including
reimbursements)                                                      77                     140
Acquisitions                                                          -                      (6 )
Total growth capital expenditures(2)                    $         1,116     

$ 2,022

(1) This amount is represented in the Consolidated Statements of Cash Flows as

Additions to property, plant and equipment after excluding growth and

maintenance reimbursements. Reimbursements are shown as Contributions from

MPC within the Financing activities section of the Consolidated Statements of

Cash Flows.

(2) Amount excludes contributions from noncontrolling interests of zero and $94

million for the nine months ended September 30, 2020 and 2019, respectively,

as reflected in the financing section of our statement of cash flows. Also

excludes a $69 million return of capital from our Wink to Webster Pipeline

joint venture in the first quarter of 2020, a $41 million return of capital

from our Whistler Pipeline joint venture in the second quarter of 2020 and a

$2 million return of capital from our Rio Pipeline joint venture in the third


    quarter of 2020. These are reflected in the investing section of our
    statement of cash flows for the nine months ended September 30, 2020.


Contractual Cash Obligations



As of September 30, 2020, our contractual cash obligations included long-term
debt, finance and operating lease obligations, purchase obligations for services
and to acquire property, plant and equipment, and other liabilities. During the
nine months ended September 30, 2020, our third-party long-term debt obligations
increased by $645 million while obligations on our MPC Loan Agreement decreased
by $594 million. In connection with the Wholesale Exchange, future purchase
obligations decreased by approximately $7.2 billion. These commitments included
fuel costs associated with the wholesale product supply agreement with MPC.
There were no other material changes to these obligations outside the ordinary
course of business since December 31, 2019.

Off-Balance Sheet Arrangements



Off-balance sheet arrangements comprise those arrangements that may potentially
impact our liquidity, capital resources and results of operations, even though
such arrangements are not recorded as liabilities under U.S. GAAP. Our
off-balance sheet arrangements are limited to indemnities and guarantees that
are described in Note 21. Although these arrangements serve a variety of our
business purposes, we are not dependent on them to maintain our liquidity and
capital resources, and we are not aware of any circumstances that are reasonably
likely to cause the off-balance sheet arrangements to have a material adverse
effect on our liquidity and capital resources.

TRANSACTIONS WITH RELATED PARTIES

At September 30, 2020, MPC owned our non-economic general partnership interest and held approximately 62 percent of our outstanding common units.



Excluding revenues attributable to volumes shipped by MPC under joint tariffs
with third parties that are treated as third-party revenues for accounting
purposes, MPC accounted for 55 percent and 54 percent of our total revenues and
other income for the third quarter of 2020 and 2019, respectively. We provide
crude oil and product pipeline transportation services based on regulated tariff
rates and storage services and inland marine transportation based on contracted
rates.

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Of our total costs and expenses, MPC accounted for 31 percent and 30 percent for
the third quarter of 2020 and 2019, respectively. MPC performed certain services
for us related to information technology, engineering, legal, accounting,
treasury, human resources and other administrative services.

For further discussion of agreements and activity with MPC and related parties
see Item 1. Business in our Annual Report on Form 10-K for the year ended
December 31, 2019 and Note 5 of the Notes to Consolidated Financial Statements
in this report.

ENVIRONMENTAL MATTERS AND COMPLIANCE COSTS



We have incurred and may continue to incur substantial capital, operating and
maintenance, and remediation expenditures as a result of environmental laws and
regulations. If these expenditures, as with all costs, are not ultimately
reflected in the prices of our products and services, our operating results will
be adversely affected. We believe that substantially all of our competitors must
comply with similar environmental laws and regulations. However, the specific
impact on each competitor may vary depending on a number of factors, including,
but not limited to, the age and location of its operating facilities.

As of September 30, 2020, there have been no significant changes to our environmental matters and compliance costs since our Annual Report on Form 10-K for the year ended December 31, 2019.

CRITICAL ACCOUNTING ESTIMATES



As of September 30, 2020, there have been no significant changes to our critical
accounting estimates since our Annual Report on Form 10-K for the year ended
December 31, 2019, except as noted below.

Impairment Assessments of Long-Lived Assets, Intangible Assets, Goodwill and
Equity Method Investments
Fair value calculated for the purpose of testing our long-lived assets,
intangible assets, goodwill and equity method investments for impairment is
estimated using the expected present value of future cash flows method and
comparative market prices when appropriate. Significant judgment is involved in
performing these fair value estimates since the results are based on forecasted
assumptions. Significant assumptions include:
•      Future Operating Performance. Our estimates of future operating
       performance are based on our analysis of various supply and demand
       factors, which include, among other things, industry-wide capacity, our
       planned utilization rate, end-user demand, capital expenditures and
       economic conditions as well as commodity prices. Such estimates are

consistent with those used in our planning and capital investment reviews.

• Future volumes. Our estimates of future throughput of crude oil, natural

gas, NGL and refined product volumes are based on internal forecasts and

depend, in part, on assumptions about our customers' drilling activity

which is inherently subjective and contingent upon a number of variable

factors (including future or expected pricing considerations), many of

which are difficult to forecast. Management considers these volume

forecasts and other factors when developing our forecasted cash flows.

• Discount rate commensurate with the risks involved. We apply a discount

rate to our cash flows based on a variety of factors, including market and

economic conditions, operational risk, regulatory risk and political risk.


       This discount rate is also compared to recent observable market
       transactions, if possible. A higher discount rate decreases the net
       present value of cash flows.


• Future capital requirements. These are based on authorized spending and


       internal forecasts.



Assumptions about the effects of COVID-19 and the macroeconomic environment are
inherently subjective and contingent upon the duration of the pandemic and its
impact on the macroeconomic environment, which is difficult to forecast. We base
our fair value estimates on projected financial information which we believe to
be reasonable. However, actual results may differ from these projections.
The need to test for impairment can be based on several indicators, including a
significant reduction in prices of or demand for commodities, a poor outlook for
profitability, a significant reduction in pipeline throughput volumes, a
significant reduction in natural gas or NGL volumes processed, other changes to
contracts or changes in the regulatory environment in which the asset or equity
method investment is located.

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Long-lived assets used in operations are assessed for impairment whenever
changes in facts and circumstances indicate that the carrying value of the
assets may not be recoverable based on the expected undiscounted future cash
flow of an asset group. For purposes of impairment evaluation, long-lived assets
must be grouped at the lowest level for which independent cash flows can be
identified, which is at least at the segment level and in some cases for similar
assets in the same geographic region where cash flows can be separately
identified. If the sum of the undiscounted cash flows is less than the carrying
value of an asset group, fair value is calculated, and the carrying value is
written down if greater than the calculated fair value.

No impairment triggers were identified in the second or third quarters of 2020,
however, during the first quarter of 2020, we identified an impairment trigger
relating to asset groups within our Western G&P reporting unit as a result of
significant impacts to forecasted cash flows for these asset groups resulting
from the first quarter events and circumstances as discussed in Note 1 of the
Notes to Consolidated Financial Statements. The cash flows associated with these
assets were significantly impacted by volume declines reflecting decreased
forecasted producer customer production as a result of lower commodity prices.
After assessing each asset group within the Western G&P reporting unit for
impairment, only the East Texas G&P asset group had a carrying value in excess
of the fair value of its underlying assets. As a result, an impairment of $174
million of property, plant and equipment and $177 million of intangibles was
recorded to "Impairment expense" on the Consolidated Statements of Income for
the first quarter of 2020. Fair value of our PP&E was determined using a
combination of an income and cost approach. The income approach utilized
significant assumptions including management's best estimates of the expected
future cash flows and the estimated useful life of the asset group. The cost
approach utilized assumptions for the current replacement costs of similar
assets adjusted for estimated depreciation and deterioration of the existing
equipment and economic obsolescence. The fair value of the intangibles was
determined based on applying the multi-period excess earnings method, which is
an income approach. Key assumptions included management's best estimates of the
expected future cash flows from existing customers, customer attrition rates and
the discount rate. Fair value determinations require considerable judgment and
are sensitive to changes in underlying assumptions and factors. As a result,
there can be no assurance that the estimates and assumptions made for purposes
of our impairment analysis will prove to be an accurate prediction of the
future. The fair value measurements for the asset group fair values represent
Level 3 measurements.

Additionally, in order to strengthen the competitive position of MPC's assets
and in response to continued decreased demand for their products, on August 3,
2020, MPC announced their decision to indefinitely idle the Gallup and Martinez
refineries and plans to evaluate possibilities to strategically reposition the
Martinez refinery, including the potential conversion of the refinery into a
renewable diesel facility. While no impairment was identified as a result of
this announcement for MPLX, we will continue to monitor for both impairment and
potential changes in useful lives of assets related to these refineries.

Unlike long-lived assets, goodwill must be tested for impairment at least
annually, and between annual tests if an event occurs or circumstances change
that would more likely than not reduce the fair value of a reporting unit below
its carrying amount. Goodwill is tested for impairment at the reporting unit
level. A goodwill impairment loss is measured as the amount by which a reporting
unit's carrying value exceeds its fair value, without exceeding the recorded
amount of goodwill.
The "Current Economic Environment" section describes the effects that the
outbreak of COVID-19 and its development into a pandemic and the decline in
commodity prices have had on our business. Due to these developments in the
first quarter of 2020, we performed impairment assessments as discussed further
below.

Prior to performing our goodwill impairment assessment as of March 31, 2020,
MPLX had goodwill totaling approximately $9,536 million. As part of that
assessment, MPLX recorded approximately $1,814 million of impairment expense in
the first quarter of 2020 related to our Eastern G&P reporting unit within the
G&P operating segment, which brought the amount of goodwill recorded within this
reporting unit to zero. The impairment was primarily driven by updated guidance
related to the slowing of drilling activity which has reduced production growth
forecasts from our producer customers. For the remaining reporting units with
goodwill, we determined that no significant adjustments to the carrying value of
goodwill were necessary. The interim impairment assessment resulted in the fair
value of the reporting units exceeding their carrying value by percentages
ranging from approximately 8.5 percent to 270.0 percent. The reporting unit
whose fair value exceeded its carrying amount by 8.5 percent, our Crude
Gathering reporting unit, had goodwill totaling $1.1 billion at March 31, 2020.
The operations which make up this reporting unit were acquired through the
merger with ANDX. MPC accounted for its October 1, 2018 acquisition of Andeavor
(through which it acquired control of ANDX), using the acquisition method of
accounting, which required Andeavor assets and liabilities to be recorded by MPC
at the acquisition date fair value. The Merger was closed on July 30, 2019 and
has been treated as a common control transaction, which required the recognition
of assets acquired and liabilities assumed using MPC's historical carrying
value. As such, given the short amount of time from when fair value was
established to the date of the impairment test, the amount by which the fair
value exceeded the carrying value within this reporting unit is not unexpected.
An increase of one percentage point to the discount rate used to estimate the
fair value of this reporting unit would not have resulted in goodwill impairment
as of March 31, 2020. No other reporting units had had fair values exceeding
carrying values of less than 20 percent. There were no events or changes in
circumstances noted in the second

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or third quarters of 2020 which would indicate it is more likely than not that
the fair value of our reporting units with goodwill is less than their carrying
amount.
Significant assumptions used to estimate the reporting units' fair value
included estimates of future cash flows and market information for comparable
assets. Fair value determinations require considerable judgment and are
sensitive to changes in underlying assumptions and factors. As a result, there
can be no assurance that the estimates and assumptions made for purposes of the
impairment tests will prove to be an accurate prediction of the future. See Note
12 of the Notes to Consolidated Financial Statements for additional information
relating to goodwill.
Equity method investments are assessed for impairment whenever factors indicate
an other than temporary loss in value. Factors providing evidence of such a loss
include the fair value of an investment that is less than its carrying value,
absence of an ability to recover the carrying value or the investee's inability
to generate income sufficient to justify our carrying value. During the first
quarter of 2020, we assessed certain of our equity method investments for
impairment as a result of a number of first quarter events and circumstances as
discussed in Note 1 of the Notes to Consolidated Financial Statements. As a
result, we recorded an other than temporary impairment for three joint ventures
in which we have an interest. Impairment of these investments was $1,264
million, of which $1,251 million was related to MarkWest Utica EMG, L.L.C. and
its investment in Ohio Gathering Company, L.L.C. The fair value of the
investments was determined based upon applying the discounted cash flow method,
which is an income approach. The discounted cash flow fair value estimate is
based on known or knowable information at the interim measurement date. The
significant assumptions that were used to develop the estimate of the fair value
under the discounted cash flow method include management's best estimates of the
expected future cash flows, including prices and volumes, the weighted average
cost of capital and the long-term growth rate. Fair value determinations require
considerable judgment and are sensitive to changes in underlying assumptions and
factors. As such, the fair value of these equity method investments represents a
Level 3 measurement. As a result, there can be no assurance that the estimates
and assumptions made for purposes of the impairment test will prove to be an
accurate prediction of the future. The impairment was recorded through "Income
from equity method investments." The impairments were largely due to a reduction
in forecasted volumes gathered and processed by the systems operated by the
joint ventures. At September 30, 2020 we had $4,081 million of equity method
investments recorded on the Consolidated Balance Sheets.
An estimate of the sensitivity to net income resulting from impairment
calculations is not practicable, given the numerous assumptions (e.g., pricing,
volumes and discount rates) that can materially affect our estimates. That is,
unfavorable adjustments to some of the above listed assumptions may be offset by
favorable adjustments in other assumptions. See Note 4 of the Notes to
Consolidated Financial Statements for additional information relating to equity
method investments.
ACCOUNTING STANDARDS NOT YET ADOPTED

While new financial accounting pronouncements will be effective for our financial statements in the future, there are no standards that have not yet been adopted that are expected to have a material impact on our financial statements. Accounting standards are discussed in Note 2 of the Notes to Consolidated Financial Statements.


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