The Energy Information Administration said U.S. crude oil inventories had risen by 5.5 million barrels in the week, defying expectations. Market analysts had anticipated a slight draw on supplies.
On the New York Mercantile Exchange, crude oil lost 88 cents to reach $103.06 per barrel. Reformulated blendstock gasoline prices added 0.15 cents to $2.6302 per gallon. Home heating oil gained 0.54 cents to $2.9981 per gallon. Natural gas dropped 4 cents to reach $3.51 per million British thermal units.
At the pump, the national average price of unleaded gasoline fell to $3.376 per gallon from Wednesday's $3.385, AAA's Daily Fuel Gauge Report said.