Margaret Nelson pays for gas at a Shell gas station in Menlo Park, Calif., Friday, Feb. 25, 2011. Oil prices wavered Friday as refineries in Europe prepared for a sustained loss in high quality Libyan... more 
Margaret Nelson pays for gas at a Shell gas station in Menlo Park, Calif., Friday, Feb. 25, 2011. Oil prices wavered Friday as refineries in Europe prepared for a sustained loss in high quality Libyan crude. less 
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Associated Press | Photo By Paul Sakuma
Mon, Feb 28, 2011 2:09 AM EST