CAMARILLO, Calif. — A national survey shows consumers across the nation are paying an average of 1.5 cents a gallon more for gasoline than they were three weeks ago.

The average price of regular gasoline at self-serve stations was $4.11 a gallon on Friday. Mid-grade was $4.24 a gallon and premium went for $4.35. That's according to the Lundberg Survey of 7,000 gas stations nationwide, released Sunday.

The survey showed the average U.S. price for gas is $1.05 higher than it was a year ago.

The cheapest gas was in Tucson, Ariz., where the price for regular was $3.82 a gallon.

San Francisco ranked the nation's highest for gas prices: $4.53 a gallon for regular. Prices rose slightly in all regions across the country, except the western states, where they were down.