The average price of a gallon of regular-grade gasoline dropped 7 cents nationally over the past two weeks, to $2.32.
Industry analyst Trilby Lundberg of the Lundberg Survey said Sunday that the drop reflects lower costs for crude oil.
She says the national average is 4 cents a gallon below the price a year ago.
In Tulsa, the price for regular-unleaded is around $1.79 at most Tulsa stations.