Oil prices edged up on Friday, in thin and choppy trade, supported by hopes Greece's upcoming election will not result in an exit from the Euro zone, while weak U.S. economic data limited gains.
Both Brent and U.S. crude posted weekly losses, though the U.S. slip was only 7 cents.
Friday's gains were hemmed in by separate reports showing U.S. manufacturing output contracted in May, while factory activity slowed in New York state in June and U.S. consumer sentiment fell.
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