That's according to the Lundberg Survey of fuel prices. It puts the price of a gallon of regular at $3.91. It's the first decline in the U.S. average since December.
Midgrade costs an average of $4.06 a gallon, and premium is at $4.18.
Diesel dropped four cents to $4.17 a gallon.
Of the cities surveyed, Tulsa, Okla., has the nation's lowest average price for gas at $3.52. Chicago has the highest at $4.26.
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