Oil prices dipped on Wednesday, giving up some of last session's gains, as a rise in U.S. crude stockpiles and easing worries over Libyan supplies weighed, although potential U.S. tariffs on Canadian and Mexican imports checked losses.

Oil prices declined today, Jan. 29, ahead of the Federal Reserve's decision on interest rates and US inventory data after the American Petroleum Insti

Oil prices slid on Wednesday, giving up some of last session's gains, as an increase in U.S. crude stockpiles and easing worries over Libyan supplies weighed on prices, although the decline was limited by potential U.