Reuters | Oil up but heads for biggest weekly loss in 8 months Reuters It had one of its worst days in two weeks on Thursday after a contraction in U.S. manufacturing cast doubt on the economic strength of the United States, the world's biggest oil consumer. Investors were looking to non-farm payroll data later in the day ... US crude closes 3.45 pct lower, at $43.16, marking a 3-week low Oil Heads for Biggest Weekly Loss Since January Oil futures settle more than 3% lower as supply concerns mount |