The Lundberg Survey of fuel prices released Sunday says the price of a gallon of regular is $3.54. Midgrade costs an average of $3.72 a gallon, and premium is $3.86.
Diesel was down seven cents to $3.98 gallon.
Of the cities surveyed in the lower 48 states, Tulsa, Okla. has the nation's lowest average price for gas at $3.21. Chicago has the highest at $3.97.