Oil prices fell for a fourth session on Wednesday after the U.S. government reported an unexpected increase in crude and gasoline stockpiles, but an increase in refining runs and a drawdown in distillates helped prices bounce off session lows. Prices also remained under pressure from this week's International Energy Agency (IEA) outlook for slower growth in global crude demand. While the crude build of 1.9 million barrels reported by the Energy Information Administration was more than forecast, it was not as big as the increase of 6.5 million barrels reported on Tuesday by industry group the American Petroleum Institute. The EIA data encouraged buying at session lows. Click Read More below for additional information.

Futures in New York dropped as much as 0.8 percent after data showed American drillers added five working oil rigs last week, stoking fears over surging U.S. output. The May oil contract gained 1.5 percent last week before expiring Friday as OPEC producers said supply curbs should continue in order to revive investments in oil and gas production. In the U.S., explorers have added 23 rigs so far this month, bringing the total working rigs to 820 last week, Baker Hughes data showed. The nation’s crude production has more than doubled from the lows of a decade ago, topping 10 million barrels a day each week since early February.