Tires

Tire maintenance is an easy way to make your car run more efficiently. Properly inflated tires can raise your gas mileage. Inflate your tires with 100% nitrogen and they will maintain proper pressure for longer.

Tires themselves can also make your car greener.  Low rolling resistance tires reduce the friction on the road, reducing the amount of fuel used to propel your car forward.  The combination of new tires and proper tire maintenance could significantly increase your gas mileage.