A truck that gets 15 MPG costs about 30 cents in gasoline for every mile driven when gas costs $4.48 a gallon. That figure comes from a simple calculation, but it changes how a truck’s fuel bill looks over a week, a month, or a year.
AAA listed the national average for regular gasoline at about $4.48 a gallon on September 28, 2026. Prices vary widely by state and station, so a driver paying more or less than that will see a different result. The bigger issue sits in the miles that rarely feel expensive individually. A 12-mile errand seems harmless. A 25-mile commute feels routine. Add those trips together, and the truck can quietly consume hundreds of dollars in gasoline each month.