In this May 5, 2011 photo, a motorist fills her car at a Mobil gas station in Pembroke Pinses, Fla., where the price of regular gas is near $4 a gallon. Americans are switching to more fuel efficient ... more 
In this May 5, 2011 photo, a motorist fills her car at a Mobil gas station in Pembroke Pinses, Fla., where the price of regular gas is near $4 a gallon. Americans are switching to more fuel efficient cars and driving fewer miles, but purchases of gasoline are still gobbling up an increasing chunk of the nation’s pocketbook. less 
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Associated Press | Photo By J Pat Carter
Sat, May 7, 2011 2:59 PM EDT