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.



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 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;

• Marathon Petroleum Corporation's ("MPC") ability 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

anticipated 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;





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• 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, other infectious disease outbreaks 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;


•     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.


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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 June 30, 2020
and June 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: q2consolidatedhighlights.jpg]]

(1) Q2 2019 includes Adjusted EBITDA attributable to Predecessor and portion of

DCF adjustments attributable to Predecessor.





Other Highlights

RECENT DEVELOPMENTS

• On July 31, MPLX entered into a Redemption Agreement with WRSW, a wholly

owned subsidiary of MPC, in which MPLX agreed to transfer the Western

wholesale distribution business that it acquired as a result of its

acquisition of ANDX to MPC in exchange for the redemption of $340 million

of MPLX common units held by WRSW. The Redemption Agreement was approved

by the MPLX board of directors following the approval of the terms of the

transaction by its independent conflicts committee. The transaction closed

on July 31.

• Announced a second 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






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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.

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 non-cash items.
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 measures 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).


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RESULTS OF OPERATIONS



The following tables and discussion are a summary of our results of operations
for the three and six months ended June 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.
                                     Three Months Ended June 30,                  Six Months Ended June 30,
(In millions)                      2020             2019       Variance        2020          2019       Variance
Total revenues and other
income(1)                    $    2,081          $  2,210     $    (129 )   $   3,073     $  4,445     $ (1,372 )
Costs and expenses:
Cost of revenues (excludes
items below)                        315               353           (38 )         683          692           (9 )
Purchased product costs              87               166           (79 )         222          360         (138 )
Rental cost of sales                 33                29             4            68           66            2
Rental cost of sales -
related parties                      41                36             5            87           79            8
Purchases - related parties         280               313           (33 )         556          591          (35 )
Depreciation and
amortization                        321               313             8           646          614           32
Impairment expense                    -                 -             -         2,165            -        2,165
General and administrative
expenses                             96                90             6           193          191            2
Other taxes                          30                25             5            61           55            6
Total costs and expenses          1,203             1,325          (122 )       4,681        2,648        2,033
Income/(loss) from
operations                          878               885            (7 )      (1,608 )      1,797       (3,405 )
Related party interest and
other financial costs                 1                 2            (1 )           4            3            1
Interest expense, net of
amounts capitalized                 206               214            (8 )         417          428          (11 )
Other financial costs                16                13             3            32           22           10
Income/(loss) before income
taxes                               655               656            (1 )      (2,061 )      1,344       (3,405 )
(Benefit)/provision for
income taxes                          -                (1 )           1             -           (2 )          2
Net income/(loss)                   655               657            (2 )      (2,061 )      1,346       (3,407 )
Less: Net income
attributable to
noncontrolling interests              7                 6             1            15           12            3
Less: Net income
attributable to Predecessor           -               169          (169 )           -          349         (349 )
Net income/(loss)
attributable to MPLX LP             648               482           166        (2,076 )        985       (3,061 )

Adjusted EBITDA attributable
to MPLX LP (excluding
Predecessor results)(2)           1,227               920           307         2,521        1,850          671
Adjusted EBITDA attributable
to MPLX LP (including
Predecessor results)(3)             N/A             1,249           N/A           N/A        2,512          N/A
DCF attributable to GP and
LP unitholders (including
Predecessor results)(3)      $      996          $    975     $      21     $   2,043     $  1,966     $     77

(1) The six months ended June 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 June 30,                Six Months Ended June 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                   $     655       $     657      $      (2 )    $ (2,061 )   $  1,346     $ (3,407 )
Provision for income taxes           -              (1 )            1             -           (2 )          2
Amortization of deferred
financing costs                     15              12              3            29           19           10
Net interest and other
financial costs                    208             217             (9 )         424          434          (10 )
Income from operations             878             885             (7 )      (1,608 )      1,797       (3,405 )
Depreciation and
amortization                       321             313              8           646          614           32
Non-cash equity-based
compensation                         3               5             (2 )           8           12           (4 )
Impairment expense                   -               -              -         2,165            -        2,165
(Income)/loss from equity
method investments                 (89 )           (83 )           (6 )       1,095         (160 )      1,255
Distributions/adjustments
related to equity method
investments                        115             132            (17 )         239          254          (15 )
Unrealized derivative
losses/(gains)(1)                    6               -              6            (9 )          4          (13 )
Acquisition costs                    -               4             (4 )           -            5           (5 )
Other                                1               -              1             2            -            2
Adjusted EBITDA                  1,235           1,256            (21 )       2,538        2,526           12
Adjusted EBITDA attributable
to noncontrolling interests         (8 )            (7 )           (1 )         (17 )        (14 )         (3 )
Adjusted EBITDA attributable
to Predecessor(2)                    -            (329 )          329             -         (662 )        662
Adjusted EBITDA attributable
to MPLX LP(3)                    1,227             920            307         2,521        1,850          671
Deferred revenue impacts            40              22             18            63           31           32
Net interest and other
financial costs                   (208 )          (217 )            9          (424 )       (434 )         10
Maintenance capital
expenditures                       (33 )           (62 )           29           (67 )        (99 )         32
Maintenance capital
expenditures reimbursements          6               9             (3 )          20           16            4
Equity method investment
capital expenditures paid
out                                 (4 )            (4 )            -           (11 )         (8 )         (3 )
Other                               (1 )            10            (11 )           3           10           (7 )
Portion of DCF adjustments
attributable to
Predecessor(2)                       -              63            (63 )           -          132         (132 )
DCF                              1,027             741            286         2,105        1,498          607
Preferred unit distributions       (31 )           (32 )            1           (62 )        (62 )          -
DCF attributable to GP and
LP unitholders                     996             709            287         2,043        1,436          607
Adjusted EBITDA attributable
to Predecessor(2)                    -             329           (329 )           -          662         (662 )
Portion of DCF adjustments
attributable to
Predecessor(2)                       -             (63 )           63             -         (132 )        132
DCF attributable to GP and
LP unitholders (including
Predecessor results)         $     996       $     975      $      21      $  2,043     $  1,966     $     77

(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 three months ended June 30, 2020, the L&S and G&P segments made up

$839 million and $388 million of Adjusted EBITDA attributable to MPLX LP,

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

segments made up $570 million and $350 million of Adjusted EBITDA

attributable to MPLX LP, respectively. For the six months ended June 30,


    2020, the L&S and G&P segments made up $1,711 million and $810



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million of Adjusted EBITDA attributable to MPLX LP, respectively. For the six
months ended June 30, 2019, the L&S and G&P segments made up $1,129 million and
$721 million of Adjusted EBITDA attributable to MPLX LP, respectively.
                                                        Six Months Ended June 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  $       2,114       $      1,954     $         160
Changes in working capital items                      12                112              (100 )
All other, net                                       (26 )               (7 )             (19 )
Non-cash equity-based compensation                     8                 12                (4 )
Net (loss)/gain on disposal of assets                 (1 )                2                (3 )
Net interest and other financial costs               424                434               (10 )
Current income taxes                                   1                  -                 1
Asset retirement expenditures                          -                  1                (1 )
Unrealized derivative (gains)/losses(1)               (9 )                4               (13 )
Acquisition costs                                      -                  5                (5 )
Other adjustments to equity method
investment distributions                              13                  9                 4
Other                                                  2                  -                 2
Adjusted EBITDA                                    2,538              2,526                12
Adjusted EBITDA attributable to
noncontrolling interests                             (17 )              (14 )              (3 )
Adjusted EBITDA attributable to
Predecessor(2)                                         -               (662 )             662
Adjusted EBITDA attributable to MPLX LP(3)         2,521              1,850               671
Deferred revenue impacts                              63                 31                32
Net interest and other financial costs              (424 )             (434 )              10
Maintenance capital expenditures                     (67 )              (99 )              32
Maintenance capital expenditures
reimbursements                                        20                 16                 4
Equity method investment capital
expenditures paid out                                (11 )               (8 )              (3 )
Other                                                  3                 10                (7 )
Portion of DCF adjustments attributable to
Predecessor(2)                                         -                132              (132 )
DCF                                                2,105              1,498               607
Preferred unit distributions                         (62 )              (62 )               -
DCF attributable to GP and LP unitholders          2,043              1,436               607
Adjusted EBITDA attributable to
Predecessor(2)                                         -                662              (662 )
Portion of DCF adjustments attributable to
Predecessor(2)                                         -               (132 )             132
DCF attributable to GP and LP unitholders
(including Predecessor results)            $       2,043       $      1,966

$ 77

(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 six months ended June 30, 2020, the L&S and G&P segments made up

$1,711 million and $810 million of Adjusted EBITDA attributable to MPLX LP,


    respectively. For the six months ended June 30, 2019, the L&S and G&P
    segments made up $1,129 million and $721 million of Adjusted EBITDA
    attributable to MPLX LP, respectively.


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



Total revenues and other income decreased $129 million in the second quarter of
2020 compared to the same period of 2019. This decrease was primarily due to
lower G&P fees from lower volumes of $46 million as well as an unfavorable
impact from lower prices of $87 million. 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. These decreases were
offset by favorable L&S rate impacts as well as increased volume deficiency
payments, favorable impacts from increased marine

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equipment and increased volumes in our Sherwood Midstream LLC joint venture due to additional plants coming online in the second half of 2019.



Cost of Revenues decreased $38 million in the second quarter of 2020 compared to
the same period of 2019, primarily due to lower operating costs due to lower
throughput, lower project-related spend and other miscellaneous expense
decreases.

Purchased product costs decreased $79 million in the second quarter of 2020
compared to the same period of 2019. This was primarily due to lower prices of
$49 million in the Southwest and Southern Appalachia and lower costs from lower
volumes of $36 million in the Southwest. This was partially offset by an
increase of $6 million in unrealized derivative losses from prior year.

Purchases - related parties decreased $33 million in the second quarter of 2020
compared to the same period of 2019. This was primarily due to lower project
spend and product purchases from MPC.

Depreciation and amortization expense increased $8 million in the second quarter
of 2020 compared to the same period of 2019, primarily due to property, plant
and equipment placed in service in the second half of 2019 and the first six
months of 2020.

Net interest expense and other financial costs decreased $6 million in the second quarter of 2020 compared to the same period of 2019 due to decreased interest on variable rate debt as a result of lower interest rates during the quarter.



General and administrative expenses increased $6 million in the second quarter
of 2020 compared to the same period of 2019 primarily due to increased employee
costs from MPC.

Six months ended June 30, 2020 compared to six months ended June 30, 2019



Total revenues and other income decreased $1,372 million in the first six months
of 2020 compared to the same period of 2019. The large decrease was 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 of 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 G&P
fees from lower volumes of $6 million and an unfavorable impact from lower
prices of $171 million. 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. These decreases were offset by
favorable L&S rate impacts as well as increased volume deficiency payments,
favorable impacts from increased marine equipment and increased volumes in our
Sherwood Midstream LLC joint venture due to additional plants coming online in
the second half of 2019.

Cost of Revenues decreased $9 million in the first six 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.

Purchased product costs decreased $138 million in the first six months of 2020
compared to the same period of 2019. This was primarily due to lower prices of
$94 million in the Southwest and Southern Appalachia and $31 million from lower
volumes in the Southwest. There was also a decrease of $13 million due to
unrealized derivative gains in the current year compared to unrealized
derivative losses in the prior year.

Rental cost of sales - related parties increased $8 million in the first six
months of 2020 compared to the same period of 2019. This was primarily due to
project costs incurred, partially offset by lower operating costs due to reduced
throughput.

Purchases - related parties decreased $35 million in the first six months of
2020 compared to the same period of 2019. This was primarily due to lower
product purchases from MPC, lower project spend and decreased other
miscellaneous costs from
MPC.

Depreciation and amortization expense increased $32 million in the first six
months of 2020 compared to the same period of 2019, primarily due to property,
plant and equipment placed in service in the second half of 2019 and the first
six months of 2020.

Impairment expense increased $2,165 million in the first six 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

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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.

Other taxes increased $6 million in the first six months of 2020 compared to the same period of 2019 primarily due to prior period refunds and credits.

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) are 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 six months ended June 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: q2lssegmenthighlights.jpg]]

(1) Includes adjusted EBITDA attributable to Predecessor.




                                     Three Months Ended June 30,                  Six Months Ended June 30,
(In millions)                    2020            2019         Variance         2020           2019       Variance
Service revenue              $     931       $     922      $       9      $   1,935       $  1,811     $     124
Rental income                      246             296            (50 )          488            631          (143 )
Product related revenue             21              20              1             40             35             5
Income from equity method
investments                         40              54            (14 )           90             99            (9 )
Other income                        52              16             36            103             28            75
Total segment revenues and
other income                     1,290           1,308            (18 )        2,656          2,604            52
Cost of revenues                   190             219            (29 )          428            445           (17 )
Purchases - related parties        211             227            (16 )          410            417            (7 )
Depreciation and
amortization                       138             134              4            276            260            16
General and administrative
expenses                            52              42             10            104             93            11
Other taxes                         18              11              7             34             27             7
Segment income from
operations                         681             675              6          1,404          1,362            42
Depreciation and
amortization                       138             134              4            276            260            16
Income from equity method
investments                        (40 )           (54 )           14            (90 )          (99 )           9

Distributions/adjustments


related to equity method
investments                         57              60             (3 )          114            114             -
Acquisition costs                    -               4             (4 )            -              5            (5 )
Non-cash equity-based
compensation                         2               2              -              5              7            (2 )
Other                                1               -              1              2              -             2
Adjusted EBITDA attributable
to Predecessor                       -            (251 )          251              -           (520 )         520
Segment adjusted EBITDA(1)         839             570            269          1,711          1,129           582

Capital expenditures               108             230           (122 )          292            428          (136 )

Investments in unconsolidated affiliates $ 74 $ 61 $ 13 $ 128 $ 68 $ 60

(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 June 30, 2020 compared to three months ended June 30, 2019



Service revenue increased $9 million in the second quarter of 2020 compared to
the same period of 2019. This was primarily due to a $28 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 $12 million
increase from additional marine equipment. There was also in increase in volume
deficiency payments, favorable price impacts and other miscellaneous items.
These increases were partially offset by reduced pipeline and storage volumes.


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Rental income decreased $50 million in the second quarter of 2020 compared to
the same period of 2019, primarily due to a decrease of $66 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 an increase of $7 million from increased terminal storage
revenue as well as other miscellaneous increases.

Income from equity method investments decreased $14 million in the second
quarter of 2020 compared to the same period of 2019, primarily due to decreased
throughput on the Explorer and Bakken pipelines due to declining demand during
the second quarter of 2020.

Other income increased $36 million in the second quarter of 2020 compared to the same period of 2019, primarily due to an increase of $38 million 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 $29 million in the second quarter of 2020 compared to
the same period of 2019, primarily due to lower operating costs due to lower
throughput, lower project-related spend and other miscellaneous expense
decreases.

Purchases - related parties decreased $16 million in the second quarter of 2020
compared to the same period of 2019, primarily due to lower project spend and
other miscellaneous expenses.

General and administrative expenses increased $10 million in the second quarter
of 2020 compared to the same period of 2019, primarily due to increased employee
costs from MPC.

Six months ended June 30, 2020 compared to six months ended June 30, 2019



Service revenue increased $124 million in the first six months of 2020 compared
to the same period of 2019. This was primarily due to an $83 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 $25
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.

Rental income decreased $143 million in the first six months of 2020 compared to
the same period of 2019, primarily due to a decrease of $159 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 an increase of $13 million from increased terminal storage
revenue.

Income from equity method investments decreased $9 million in the first six
months of 2020 compared to the same period of 2019, primarily due to decreased
throughput on the Explorer and Bakken pipelines due to declining demand during
the second quarter of 2020.

Other income increased $75 million in the first six months of 2020 compared to
the same period of 2019, primarily due to an increase of $76 million 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 $17 million in the first six months of 2020 compared
to the same period of 2019, primarily due to lower operating costs due to lower
throughput, lower project-related spend and other miscellaneous expense
decreases.

Purchases - related parties decreased $7 million in the first six months of 2020
compared to the same period of 2019, primarily due to lower project spend and
other miscellaneous expenses.

Depreciation and amortization increased $16 million in the first six months of
2020 compared to the same period of 2019, primarily due to property, plant and
equipment placed in service in the second half of 2019 and the first six months
of 2020.

General and administrative expenses increased $11 million in the first six months of 2020 compared to the same period of 2019, primarily due to increased employee costs from MPC.




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G&P Segment


                  [[Image Removed: q2gpsegmenthighlights.jpg]]

(1) Includes adjusted EBITDA attributable to Predecessor.




                                     Three Months Ended June 30,                  Six Months Ended June 30,
(In millions)                    2020            2019         Variance         2020          2019       Variance
Service revenue              $     489       $     544       $     (55 )   $   1,025      $  1,072     $     (47 )
Rental income                       89              83               6           177           172             5
Product related revenue            151             231             (80 )         373           507          (134 )
Income/(loss) from equity
method investments                  49              29              20        (1,185 )          61        (1,246 )
Other income                        13              15              (2 )          27            29            (2 )
Total segment revenues and
other income/(loss)                791             902            (111 )         417         1,841        (1,424 )
Cost of revenues                   199             199               -           410           392            18
Purchased product costs             87             166             (79 )         222           360          (138 )
Purchases - related parties         69              86             (17 )         146           174           (28 )
Depreciation and
amortization                       183             179               4           370           354            16
Impairment expense                   -               -               -         2,165             -         2,165
General and administrative
expenses                            44              48              (4 )          89            98            (9 )
Other taxes                         12              14              (2 )          27            28            (1 )
Segment income/(loss) from
operations                         197             210             (13 )      (3,012 )         435        (3,447 )
Depreciation and
amortization                       183             179               4           370           354            16
Impairment expense                   -               -               -         2,165             -         2,165
(Income)/loss from equity
method investments                 (49 )           (29 )           (20 )       1,185           (61 )       1,246

Distributions/adjustments


related to equity method
investments                         58              72             (14 )         125           140           (15 )
Unrealized derivative
losses/(gains)(1)                    6               -               6            (9 )           4           (13 )
Non-cash equity-based
compensation                         1               3              (2 )           3             5            (2 )
Adjusted EBITDA attributable
to Predecessor                       -             (78 )            78             -          (142 )         142
Adjusted EBITDA attributable
to noncontrolling interests         (8 )            (7 )            (1 )         (17 )         (14 )          (3 )
Segment Adjusted EBITDA(2)         388             350              38           810           721            89

Capital expenditures               110             326            (216 )         244           632          (388 )

Investments in unconsolidated affiliates $ 57 $ 127 $ (70 ) $ 94 $ 255 $ (161 )

(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 June 30, 2020 compared to three months ended June 30, 2019



Service revenue decreased $55 million in the second quarter of 2020 compared to
the same period of 2019. This was primarily due to lower fees from lower volumes
in the Southwest, Bakken and Rockies of $38 million, a decrease due to lower
prices in the Bakken of $2 million as well as other miscellaneous decreases.

Rental income increased $6 million in the second quarter of 2020 compared to the
same period of 2019. This was primarily due to higher rental income from higher
volumes in the Marcellus.

Product related revenue decreased $80 million in the second quarter 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 $85 million and lower volumes in the
Southwest of $34 million. This was partially offset by $20 million of volume
increases in the Marcellus, Rockies and at our Javelina plant in the Southwest
(this plant experienced downtime for maintenance in 2019), as well as other
miscellaneous increases.

Income from equity method investments increased $20 million in the second
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.

Purchased product costs decreased $79 million in the second quarter of 2020
compared to the same period of 2019. This was primarily due to lower prices of
$49 million in the Southwest and Southern Appalachia and lower costs from lower
volumes of $36 million in the Southwest. This was partially offset by an
increase of $6 million in unrealized derivative losses from prior year.

Purchases - related parties decreased $17 million in the second quarter of 2020
compared to the same period of 2019, with this decrease primarily being
attributable to aligning various expenses as a result of the ANDX acquisition
and lower product purchases from MPC.

Six months ended June 30, 2020 compared to six months ended June 30, 2019

Service revenue decreased $47 million in the first six months of 2020 compared to the same period of 2019. This was primarily due to lower fees from lower volumes in the Rockies of $19 million and lower prices in the Bakken of $3 million as well as other miscellaneous decreases.



Rental income increased $5 million in the first six months of 2020 compared to
the same period of 2019. This was primarily due to fees from higher volumes in
the Marcellus.

Product related revenue decreased $134 million in the first six 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 $168 million and lower volumes
of $21 million in the Southwest. This was partially offset by $21 million of
volume increases in the 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 $1,246 million in the first six
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 of 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. 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 $18 million in the first six 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 as well as higher
repairs, maintenance and operating costs in the Marcellus offset by lower
repairs, maintenance and operating costs in the Southwest, Southern Appalachia
and Rockies.

Purchased product costs decreased $138 million in the first six months
of 2020 compared to the same period of 2019. This was primarily due to lower
prices of $94 million in the Southwest and Southern Appalachia and $31 million
from lower volumes in

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the Southwest. There was also a decrease of $13 million due to unrealized derivative gains in the current year compared to unrealized derivative losses in the prior year.



Purchases - related parties decreased $28 million in the first six 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
and lower product purchases from MPC.

Depreciation and amortization increased $16 million in the first six months
of 2020 compared to the same period of 2019 primarily due to property, plant and
equipment placed in service throughout the second half of 2019 and the first six
months of 2020.

Impairment expense increased $2,165 million in the first six 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 $9 million in the first six months of 2020 compared to the same period of 2019 due to lower employee related costs.

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 will be 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
the seasonality fluctuations is declining due to our growth in fee-based
business.


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OPERATING DATA(1)


                 [[Image Removed: q2lspipelinethroughput.jpg]]

                                    Three Months Ended                     Six Months Ended
                                          June 30,                              June 30,
                                   2020              2019                2020                2019
L&S
Pipeline throughput (mbpd)
Crude oil pipelines                   2,733            3,242             2,971                 3,174
Product pipelines                     1,586            1,867             1,746                 1,882
Total pipelines                       4,319            5,109             4,717                 5,056

Average tariff rates ($ per
barrel)(2)
Crude oil pipelines           $        0.99     $       0.88     $        0.96          $       0.92
Product pipelines                      0.84             0.75              0.81                  0.72
Total pipelines               $        0.94     $       0.83     $        0.90          $       0.84

Terminal throughput (mbpd)            2,420            3,287             2,693                 3,253

Marine Assets (number in
operation)(3)
Barges                                  305              261               305                   261
Towboats                                 23               23                23                    23



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[[Image Removed: q2gpgatheringthroughput.jpg]][[Image Removed: q2gpprocessingthroughput.jpg]][[Image Removed: q2gpfractionationthroughput.jpg]]


                                        Three Months Ended              Three Months Ended
                                           June 30, 2020                   June 30, 2019
                                                      MPLX LP                         MPLX LP
                                    MPLX LP(4)      Operated(5)     MPLX LP(4)      Operated(5)
G&P
Gathering Throughput (MMcf/d)
Marcellus Operations                     1,385           1,385           1,266           1,266
Utica Operations                             -           1,903               -           2,066
Southwest Operations                     1,365           1,393           1,617           1,617
Bakken Operations                          126             126             147             147
Rockies Operations                         495             683             649             852
Total gathering throughput               3,371           5,490           3,679           5,948

Natural Gas Processed (MMcf/d)
Marcellus Operations                     4,112           5,516           4,216           5,202
Utica Operations                             -             585               -             823
Southwest Operations                     1,412           1,510           1,558           1,558
Southern Appalachian Operations            223             223             243             243
Bakken Operations                          126             126             147             147
Rockies Operations                         516             516             585             585
Total natural gas processed              6,389           8,476           6,749           8,558

C2 + NGLs Fractionated (mbpd)
Marcellus Operations(6)                    464             464             440             440
Utica Operations(6)                          -              31               -              40
Southwest Operations                        13              13               3               3
Southern Appalachian Operations(7)          12              12              12              12
Bakken Operations                           19              19              21              21
Rockies Operations                           4               4               3               3
Total C2 + NGLs fractionated(8)            512             543             479             519



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                                           Six Months Ended                     Six Months Ended
                                              June 30, 2020                        June 30, 2019
                                                           MPLX LP                              MPLX LP
                                       MPLX LP(4)        Operated(5)        MPLX LP(4)        Operated(5)
G&P
Gathering Throughput (MMcf/d)
Marcellus Operations                     1,402                1,402           1,274                1,274
Utica Operations                             -                1,852               -                2,087
Southwest Operations                     1,461                1,497           1,600                1,600
Bakken Operations                          141                  141             150                  150
Rockies Operations                         544                  729             644                  839
Total gathering throughput               3,548                5,621           3,668                5,950

Natural Gas Processed (MMcf/d)
Marcellus Operations                     4,155                5,519           4,185                5,175
Utica Operations                             -                  616               -                  820
Southwest Operations                     1,530                1,595           1,578                1,578
Southern Appalachian Operations            233                  233             239                  239
Bakken Operations                          141                  141             150                  150
Rockies Operations                         528                  528             578                  578
Total natural gas processed              6,587                8,632           6,730                8,540

C2 + NGLs Fractionated (mbpd)
Marcellus Operations(6)                    460                  460             430                  430
Utica Operations(6)                          -                   33               -                   43
Southwest Operations                        14                   14              10                   10
Southern Appalachian Operations(7)          12                   12              12                   12
Bakken Operations                           25                   25              18                   18
Rockies Operations                           4                    4               4                    4
Total C2 + NGLs fractionated(8)            515                  548             474                  517


                                        Three Months Ended              Six Months Ended
                                              June 30,                       June 30,
                                          2020            2019           2020           2019
Pricing Information
Natural Gas NYMEX HH ($ per MMBtu) $     1.76            $ 2.51    $     1.81          $ 2.69
C2 + NGL Pricing ($ per gallon)(9) $     0.34            $ 0.52    $     

0.37 $ 0.57

(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 195 mbpd of total MPLX

Operated, fractionated products for the three months ended June 30, 2020 and

2019, respectively, and approximately 191 mbpd and 192 mbpd of total

fractionated products for the six months ended June 30, 2020 and 2019,

respectively. Purity ethane makes up approximately 186 mbpd and 189 mbpd of

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

June 30, 2020 and 2019, respectively, and approximately 184 mbpd and 183 mbpd

of total fractionated products for the six months ended June 30, 2020 and


    2019, respectively.



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(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.

LIQUIDITY AND CAPITAL RESOURCES

Cash Flows



Our cash and cash equivalents were $67 million at June 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:
                                    Six Months Ended June 30,
(In millions)                        2020               2019
Net cash provided by (used in):
Operating activities            $      2,114       $      1,954
Investing activities                    (777 )           (1,439 )
Financing activities                  (1,285 )             (568 )
Total                           $         52       $        (53 )



Net cash provided by operating activities increased $160 million in the first
six months of 2020 compared to the first six months of 2019, primarily due to
increased net income of $22 million, excluding impairments, as well as other
changes related to depreciation and amortization and changes in working capital
items.

Net cash used in investing activities decreased $662 million in the first six
months of 2020 compared to the first six 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 $1,285 million use of cash in the first six months
of 2020 compared to a $568 million use of cash in the first six months of 2019.
The use of cash for the first six months of 2020 was primarily due to
distributions of $1,445 million to common unitholders, distributions of $41
million to Series A preferred unitholders, distributions of $21 million to
Series B preferred unitholders, distributions of $17 million to noncontrolling
interests, repayment of $1,675 million on the MPLX Credit Agreement, payments of
$7 million related to financing leases, and repayment of $3,302 million on the
MPC Loan Agreement. These uses of cash were offset by borrowings of $2,500
million on the revolving credit facility, $2,708 million on the MPC Loan
Agreement, and $20 million of contributions from MPC.

Debt and Liquidity Overview

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

                            June 30, 2020
MPLX LP:
Bank revolving credit facility          $         825
Term loan facility                              1,000
Floating rate senior notes                      2,000
Fixed rate senior notes                        16,887
Consolidated subsidiaries:
MarkWest                                           23
ANDX                                              190
Financing lease obligations                        13
Total                                          20,938
Unamortized debt issuance costs                  (100 )
Unamortized discount/premium                     (279 )
Amounts due within one year                        (3 )

Total long-term debt due after one year $ 20,556






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Our intention is to maintain an investment grade credit profile. As of June 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 June 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 the Term Loan Agreement and may limit our ability to obtain future
financing, including refinancing existing indebtedness.

Our liquidity totaled $4.2 billion at June 30, 2020 consisting of:


                                                                    June 30, 2020
                                                                                               Available
(In millions)                                Total Capacity      Outstanding Borrowings        Capacity
Bank revolving credit facility due 2024(1) $          3,500     $               (825 )      $       2,675
MPC Loan Agreement                                    1,500                        -                1,500
Total liquidity                            $          5,000     $               (825 )              4,175
Cash and cash equivalents                                                                              67
Total liquidity                                                                             $       4,242

(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.


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Equity and Preferred Units Overview

Common units



The table below summarizes the changes in the number of units outstanding
through June 30, 2020:
(In units)
Balance at December 31, 2019   1,058,355,471
Unit-based compensation awards       253,291
Balance at June 30, 2020       1,058,608,762



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 six months ended June 30, 2020, we issued no common
units under our ATM program. As of June 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 $278 million per quarter, or $1,112 million
per year, based on the number of common units outstanding at June 30, 2020. On
July 28, 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 August 14, 2020
to unitholders of record on August 7, 2020. This is consistent with the first
quarter 2020 distribution of $0.6875 per unit and an increase of 3.0 percent
over the second 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.

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 will be 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. During the
three months ended June 30, 2020 a distribution of $2 million was earned as a
result of increased volumes on the TexNew Mex pipeline due to the idling of
MPC's Gallup, New Mexico refinery.

The allocation of total quarterly cash distributions is as follows for the three
and six months ended June 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.

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                                 Three Months Ended June 30,         Six Months Ended June 30,
(In millions, except per unit
data)                               2020              2019             2020              2019
Distribution declared:
Limited partner units -
public                        $          270     $        261     $         540     $        452
Limited partner units - MPC              445              431               903              763
Total LP distribution
declared                                 715              692             1,443            1,215
Series A preferred units                  21               21                41               41
Series B preferred units                  10               21                21               21
Total distribution declared              746              734             1,505            1,277

Cash distributions declared
per limited partner common
unit                          $       0.6875     $     0.6675     $      1.3750     $     1.3250



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.

Our capital expenditures are shown in the table below:


                                                             Six Months Ended June 30,
(In millions)                                                 2020               2019
Capital expenditures:
Maintenance                                             $          67       $          99
Maintenance reimbursements                                        (20 )               (16 )
Growth                                                            469                 961
Growth reimbursements                                               -                 (12 )
Total capital expenditures                                        516               1,032
Less: (Decrease)/increase in capital accruals                    (172 )               (77 )
Asset retirement expenditures                                       -                   1

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

                                                 688       

1,108


Investments in unconsolidated affiliates                          222       

323


Acquisitions                                                        -                  (6 )
Total capital expenditures and acquisitions                       910       

1,425


Less: Maintenance capital expenditures (including
reimbursements)                                                    47                  83
Acquisitions                                                        -                  (6 )
Total growth capital expenditures(2)                    $         863       

$ 1,348

(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 six months ended June 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 and a $41 million return of

capital from our Whistler Pipeline joint venture in the second quarter of

2020. These are reflected in the investing section of our statement of cash


    flows for the six months ended June 30, 2020.




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Contractual Cash Obligations



As of June 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 six
months ended June 30, 2020, our third-party, long-term debt obligations
increased by $825 million and was primarily used to repay our MPC Loan
Agreement. 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 June 30, 2020, MPC owned our non-economic general partnership interest and held approximately 63 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 56 percent and 53 percent of our total revenues and
other income for the second 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.

Of our total costs and expenses, MPC accounted for 32 percent and 30 percent for the second 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 June 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 June 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,



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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.
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 quarter 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 resulted in the fair value of the underlying
assets being less than the carrying value. 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.

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.

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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
(including acquiring 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 quarter 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 June 30, 2020 we had $4,065 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.

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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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