There are several things you can do to increase your fuel mileage. Maintenance is the most important thing you can do. Make certain you have a clean air filter at all times. Change your oil more often ( every 3,000 miles ) instead of manufacturers recommend interval. Maintain proper inflation of your vehicles tires ( listed inside drivers door jam ). Use high octane fuel and have your fuel filter changed every 30,000 miles. These are a few things you can do to help your fuel mileage. To increase it further, keep from heavy acceleration and do not drive in a hurry.