The average U.S. price of a gallon of gasoline has dropped six cents over the past two weeks.
The Lundberg Survey of fuel prices released Sunday says the price of a gallon of regular is $3.65. Midgrade costs an average of $3.82 a gallon, and premium is $3.96.
Diesel was down two pennies to $4.05 gallon.
Of the cities surveyed in the lower 48 states, Billings, Mont., has the nation's lowest average price for gas at $3.33. Chicago has the highest at $4.05.