Oil traded near $41 a barrel as investors shifted their focus to domestic supply, with expectations for another build in already swelling U.S. stockpiles countering anticipation of a dovish statement from the Federal Reserve. Futures in New York were little changed after declining 1.3% on Tuesday. Analysts in a Bloomberg survey expect a 450,000-barrel gain in U.S. crude stockpiles. While the industry-funded American Petroleum Institute reported a 6.83-million-barrel decrease in oil supplies, it posted a rise of 1.08 million barrels in gasoline inventories. The U.S. central bank is set to announce its rate decision Wednesday.