Tips that save gas

Don't top off. Don't bother topping off when filling your car's gas tank. Any additional gas is just going to slop around or seep out. Why waste your money paying for gas your car won't use? Stop pumping at the first indication that your tank is full when the automatic nozzle clicks off.

Tighten up that gas cap. Gas will evaporate from your car's gas tank if it has an escape. Loose, missing or damaged gas caps cause 147 million gallons of gas to evaporate each year, according to the Car Care Council. So be sure to tighten up that gas cap each time you fuel up your car.

Pump up your tires. Don't get caught driving on underinflated tires. Underinflated tires wear down more quickly and they also lower your car's gas mileage. "Tires that have low pressure offer more resistance so the engine is going to work harder to keep the car at 60," says Brian Moody, road test editor at Edmunds.com. Your car's gas mileage may plummet by as much as 15 percent. Driving on underinflated tires may also reduce the life of your tires by 15 percent or more.

Check your tire pressure once a month. Buy a digital gauge and keep it in your glove box. Compare the pressure in your tires with the recommended pressure listed in your owner's manual and on the placard in your car door. Then inflate your tires as needed. Be sure to check tire pressure when your tires are cold. A good time is early in the morning after your car's been idle overnight.