Oil futures fell slightly on Wednesday as record high U.S. crude and gasoline inventories fed concerns about a glut.
Trade was choppy and losses were limited by evidence that OPEC and other producing countries were complying with agreed-upon supply cuts.
The dollar weakened, which also helped support greenback-denominated oil.
U.S. crude stocks rose 9.5 million barrels last week, the U.S. Energy Information Administration (EIA) said, nearly three times more than forecast, but confirming a trade group's report late Tuesday of a larger-than-expected build.
U.S. crude inventories hit a peak at 518.12 million barrels, while gasoline stocks also touched a record, rising 2.8 million barrels to 259.1 million barrels, according to the EIA.