1. Key points

  • Aggressive driving (speeding, rapid acceleration and braking) lowers gas mileage.
  • Mileage usually drops at higher highway speeds.
  • Extra weight and roof cargo boxes add drag and reduce efficiency.
  • Properly inflated tires help fuel economy and tire life.

2. Maintenance matters

FuelEconomy.gov notes that keeping your engine tuned, tires inflated and using the recommended grade of motor oil all support better mileage.