The Lundberg Survey is reporting that the average price of gas rose about two cents a gallon nationwide over the past two weeks.
The national average in the lower 48 states is now $3.70 per gallon.
Gasoline is most expensive in Chicago, at $4.14 a gallon.
The lowest gas prices were found in Tucson, where a gallon was going for $3.37.
But, you can find gas as low as $3.28 in Oklahoma City.
Lundburg says crude oil prices have gone up slightly and will likely go much higher if the Turmoil in Iraq continues.