Gasoline prices are seen Wednesday, Apri 4, 2007, in San Francisco. Crude oil prices slipped to $64 a barrel Wednesday after Iran said it would release the 15 British sailors it has been holding captive, alleviating some fears about tensions escalating and prompting the country to block oil exports. But gasoline prices rose on a government report that U.S. gasoline inventories declined for the eighth straight week and that demand is still strong. (AP Photo/Ben Margot)