Published: Dec 09, 2012 8:05 PM EST

CAMARILLO, Calif. (AP) - The average U.S. price of a gallon of gasoline has dropped ten cents over the past three weeks.
 
That's according to the Lundberg Survey of fuel prices, released Sunday, which puts the price of a gallon of regular at $3.38.
 
Midgrade costs an average of $3.55 a gallon, and premium is $3.69.
 
Diesel dipped two cents to $4.02 a gallon.
 
Of the cities surveyed in the lower 48 states, Memphis, Tenn., has the nation's lowest average price for gas at $3.04. Long Island, N.Y. has the highest at $3.85.