FILE - In this file photo taken April 18, 2011, gasoline pump prices are shown at a gas station, in Portland, Ore. The average price has already passed $4 a gallon in a handful of states and several ... more 
FILE - In this file photo taken April 18, 2011, gasoline pump prices are shown at a gas station, in Portland, Ore. The average price has already passed $4 a gallon in a handful of states and several others are on the brink of joining the list. less 
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Associated Press | Photo By Rick Bowmer, file
Wed, Apr 20, 2011 11:01 AM EDT