New York's main contract, light sweet crude for March delivery, tumbled 25 centsto $75.83 a barrel.
Brent North Sea crude for delivery in March shed 13 cents to $74.45.
"The DoE report was not very bullish. The refineries' capacities were down at around 78 per cent and that was their lowest in the two decades," said Serene Lim, a Singapore-based oil analyst with the ANZ bank.
The US Department of Energy (DoE) said Thursday that gasoline reserves in the world's biggest economy increased by a stronger-than-expected 3.9 million barrels in the week ending January 15, striking a two-year high.
However, US crude stocks fell 400,000 barrels, according to the DoE report, confounding expectations of a large gain of 1.9 million barrels.
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It said refineries operated at 78.4 per cent of capacity last week, their lowest rate in at least two decades apart from the immediate aftermath of a hurricane.
Moves by China, the world's second biggest energy consumer, to slow down its roaring economy also weighed on traders' minds.