Avoid the temptation to "top off" when at the gas pump. When filling up, allow the pump to automatically shut off when it's full; you'll know that point has been reached when you hear a clicking sound and the gas nozzle stops pumping gas. Adding those extra few pumps of gas can actually waste your money, because gasoline is often fed from your tank back into the station's tanks via the vapor-recovery system, which prevents gas from escaping during the fueling process. To get the most gas for your buck, stop filling up when the pump says your tank is full.
ANDREWS MCMEEL SYNDICATION