Oil prices settled lower on Thursday pressured by weakening gasoline demand. Though gasoline inventories fell last week for a seventh week, gasoline product supplied, a proxy for product demand, slipped below 9 million barrels. The fall suggested that gasoline markets, which had underpinned a recent market rally, may have been overbought, according to Bob Yawger, director of energy futures at Mizuho. U.S. business activity held steady in March, but prices increased across the board, suggesting that inflation could remain elevated after picking up at the start of the year. WTI traded down $.20 or -.3% to close at $81.07. Brent traded down $.17 or .2% to close at $85.78.