MOSCOW, April 27 (Reuters) - Russia's primary oil refining capacity, idled due to maintenance, technical outages and drone attacks, increased so far in April by 13.6% from March, Reuters calculations showed on Saturday.

April's data has also been revised up by 2.2% from previous expectations.

At the same time, share of primary oil refining capacity, knocked out by Ukrainian may not be that steep if, as expected, long-term maintenances will continue into next month. (Reporting by Reuters; writing by Vladimir Soldatkin; editing by David Evans)