These four little-known tips will save you from wasting time and money at the pump.
1. Tighten Up: Tighten your gas cap and save up to 30 gallons a year!
2. Tune Up: Get your car tuned up regularly and improve mileage by up to 9%.
3. Freshen Up: Replace your air filters. Dirty filters reduce mileage by up to 10%.
4. Park Smarter: Park in the shade (or a garage), if possible. The sun evaporates fuel from your tank.