How Low Can You Go?
Air pressure, weight and drag all contribute to fuel efficiency.
Inflate your tires
Check your tire pressure at least once a month and maintain it at manufacturer specifications. Keeping your tires properly inflated helps reduce the amount of drag your engine must overcome, thereby saving fuel. If your tires are under-inflated by just 4 pounds, it will cost you a half-mile-per-gallon.
Take a load off
The heavier your car is, the more gas it uses. Every extra 100 pounds costs you about a half-mile-per-gallon, so don't carry unnecessary weight.
Avoid drag
If you drive with a roof rack, aerodynamic drag increases and results in higher fuel consumption. A roof rack that is not permanently fixed to your vehicle should be removed when it is not being used.
