Do not idle your engine. Turn your engine off if you stop for longer than one minute. Restarting uses less gasoline than a minute s idling. Avoid fuel-wasting accessories. Remove excess weight .
Heavier cars use more gasoline than similarly powered lighter cars.
Check your car or truck and remove any unnecessary items. For every 100 pounds you remove, gas mileage increases from 1 percent to 4 percent, depending on the size of the car and the engine. Maintain proper tire pressure. Underinflated tires increase rolling resistance, which in turn decreases gas mileage. Check pressures when tires are cold.