China39;s manufacturing output expands in February
Russia39;s oil output back at presanctions level Kommersant
OPEC output rises in February as Nigeria rebounds further
API said to report U.S. crude inventories rise
Coming up EIA supply report, 1530 GMT

LONDON, March 1 Reuters Oil slipped on Wednesday, giving up an earlier gain, as signs of ample supply and rising U.S. crude inventories countered hopes for higher demand arising from a jump in manufacturing in top crude importer China.

U.S. oil inventories rose by 6.2 million barrels in the week ended Feb. 24, according to market sources citing American Petroleum Institute API data, ahead of official Energy Information Administration stocks figures at 1530 GMT.

Brent crude was down 33 cents, or 0.4, to 83.12 a barrel at 1010 GMT., U.S. West Texas Intermediate WTI crude fell 43 cents, or 0.6, to 76.62.

In other signs of ample supply, Russia39;s oil production reached the presanctions level for the first time in February, the Kommersant business daily reported citing sources, and OPEC production rose in February according to a Reuters survey.

China39;s economy is rebounding now, and this can only be a positive driver for oil prices, said Stephen Brennock of oil broker PVM.

Resilient Russian supply is keeping buying interest at bay, he added.

Oil was up earlier in the session, supported by an official index that showed China39;s manufacturing activity expanded at the fastest pace in more than a decade in…