File-In this March 19, 2012, file photo, a motorist pumps gas at a Mount Lebanon, Pa., mini-mart. Gas is getting a bit pricier ahead of Labor Day weekend. The average U.S. price for a gallon of ... more 
File-In this March 19, 2012, file photo, a motorist pumps gas at a Mount Lebanon, Pa., mini-mart. Gas is getting a bit pricier ahead of Labor Day weekend. The average U.S. price for a gallon of gasoline rose by 1.8 cents to $3.56 a gallon Thursday, Aug. 29, 2013, its biggest overnight jump in six weeks, according to auto club AAA. (AP Photo/Gene J. Puskar, File) less 
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Associated Press | Photo By Gene J. Puskar, File
Thu, Aug 29, 2013 5:48 PM EDT