Oil prices fell for a third day on Thursday, dragged down by a larger-than-expected crude and gasoline stock build in the U.S. and easing supply concerns. Brent futures fell 43 cents, or 0.50%, to $85.39 a barrel at 0623 GMT, while U.S. West Texas Intermediate crude retreated 53 cents, or 0.63%, to $82.96 a barrel. Both benchmarks have given back most early-week gains after falling more than 2% in the previous session. U.S. crude oil