The average price of a gallon of gas dropped about 10 cents over the past three weeks.
According to the Lundberg survey, regular is going for $3.37 cents a gallon on average nationwide.
The average price has dropped 46 cents over the past nine weeks.
Lundberg says supply problems at U.S. refineries have been resolved, and we're in the season of typically lower demand for gasoline.
The survey says those factors make it likely we'll see more price cuts.