U.S. crude oil fell to its lowest in almost six-and-a-half years on Friday as huge stockpiles and refinery shutdowns added to concerns about global oversupply and slowing economies in Asia. Oil had already tumbled more than 3 percent on Thursday, driven by a report that stocks at Cushing, Oklahoma, the delivery point for U.S. crude futures, rose more than 1.3 million barrels in the week to Aug. 11. U.S. crude CLc1 was down 30 cents at $41.93 a barrel by 0845 GMT. The contract earlier hit an intraday low of $41.35, its lowest since March 4, 2009. Brent crude LCOc1 traded at $49.00, down 22 cents and some way off its 2015-low of $45.19 reached in January. U.S. crude is much weaker than the North Sea benchmark, partly due to […]