Motorists fill up at a Shell gas station in Seattle, Friday, April 15, 2011, during a radio station promotion that priced regular-grad gasoline at $2.99 a gallon for several hours during the morning. ... more 
Motorists fill up at a Shell gas station in Seattle, Friday, April 15, 2011, during a radio station promotion that priced regular-grad gasoline at $2.99 a gallon for several hours during the morning. After the promotion ended, prices returned to $3.99 a gallon for regular. less 
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Associated Press | Photo By Ted S. Warren
Fri, Apr 15, 2011 2:05 PM EDT