1. Maintain Your Tire Pressure
Studies have shown that drivers use up to 10% less gas simply by keeping their tires inflated at the recommended level. Read the sidewalls of your tires to find their optimal level of inflation (usually measured in PSI).
                                                                              [Potential Savings = 10%]

2. Use a Gas Rebate Card
Paying for your gas purchases with a rebate card can give you up to 10% cash back on all the gas you purchase – automatically . The most popular gas rebate cards are offered by Discover® (5% rebate), Chase (3%-6% rebate), and American Express® (5% rebate). Refer to the charts to your right for a comparison of current offers and links to their online applications.                                                                                [Potential Savings = 3% to 10%]

3. Observe Speed Limits
The optimal range for fuel efficiency is 35 mph to 55 mph. For each 5 mph you drive over 55 mph, your fuel efficiency decreases by about 7%. Adhering to speed limits is not only a safer way to drive; it will help you save on gas as well.
                                                                                [Potential Savings = 7%]

4. Avoid Excessive Idling
When your vehicle is idling, it is burning gas while sitting in place. In other words, idling gets you 0 miles-per-gallon. By simply avoiding excessive idling, you can cut down on your gas consumption by 2% or more.
                                                                                [Potential Savings = 2%]

5. Remove Excess Weight
Are you carrying any unnecessary items in your vehicle? Removing "dead weight" can increase your gas mileage by as much as 2% for every 100 pounds you remove.                                                              [Potential Savings = 2%]

6. Use Your Cruise Control
Using cruise control on the highway is a great way to regulate your speed and, in turn, improve your gas mileage. By avoiding fluctuations in your speed, you can save as much as 5% on gas.                                [Potential Savings = 5%]

7. Use Overdrive
When your vehicle is in overdrive, its engine does not have to work as hard to maintain a high driving speed. This results in less wear-and-tear on the engine as well as better gas mileage.                                     [Potential Savings = 2%]

8. Compare Fuel Economy Ratings
Before purchasing your next vehicle, be sure to compare the fuel economy ratings of various vehicles.  These ratings are posted on the window of every new vehicle (and many used vehicles) at dealerships throughout the U.S.  Choosing a hybrid vehicle that gets 52 miles-per-gallon rather than an SUV that gets 13 miles-per-gallon would give you 75% better gas mileage.
                                                                              [Potential Savings = 75%]

9. Perform Regular Maintenance
A simple tune-up can result in gas savings of up to 4%, and replacing a faulty part such as an oxygen sensor can save you as much as 40%.  Changing your oil and air filter regularly can also result in better mileage. Always be sure to use the oil grade recommended for your particular engine.
                                                                                [Potential Savings = 4%]

10. Get Cash Back
Some credit card providers offer a cash back reward for gas and auto maintenance purchases, as well as other purchases made with the card. These cash back rewards can range from a standard 5% if the card is used to purchase gas at any gas station, up to 10% if the purchase is made at a particular gas station. Refer to the chart to your right for a complete breakdown of cash back offers from major credit card providers, along with links to each card's online application.                                         
                                                                              [Potential Savings = 10%]