The Lundberg Survey of fuel prices released Sunday says the average national price of a gallon of regular is $3.12.
Analyst Trilby Lundberg found in the survey completed Friday that the average price for mid-grade is $3.26, and premium was at $3.37.
Memphis, Tenn., had the lowest average price among cities surveyed at $2.90 a gallon for regular. And as usual, San Francisco was the highest among surveyed areas at $3.35.
Bakersfield had California's lowest gas prices at $3.26 for a regular gallon.