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You can use energy more wisely if you remember CAMS – Combine trips, Accelerate smoothly, Maintain your vehicle, and Slow down.



When I am behind the wheel, how can I get more miles per gallon?


Besides changing driving habits, what can I do to improve vehicle fuel efficiency?

Maintain your vehicle. Have your car tuned regularly and keep tires properly inflated. An engine tune-up can improve car fuel economy by an average of one mile per gallon; under-inflated tires can reduce it by that amount. Also, less use of your air conditioner can improve fuel economy by as much as two miles per gallon.


More fuel-efficient vehicles can save gasoline. A highly fuel-efficient vehicle could potentially cut gasoline use in half or more. How much depends on the vehicle and driving habits and needs. If a less fuel-efficient car requires 20 gallons of gasoline a week compared with 10 gallons for a highly fuel-efficient vehicle, more than 500 gallons of gasoline could be saved annually.

What about ethanol?

Ethanol, which is often blended in gasoline, contains less energy per gallon than gasoline. However, a 10-percent or less ethanol blend would have only a slight impact on fuel efficiency. According to U.S. Department of Energy and U.S. Environmental Protection Agency fuel economy guidelines, E-85 (85 percent ethanol/15 percent gasoline blend) may reduce fuel efficiency by 26 percent.

Can I avoid fuel evaporation and loss by keeping my tank almost full?


Does it help to fill up in the morning when fuel is cool?

Very little. While it’s true that gasoline expands as it gets hotter (reducing the energy content in a given volume), the expansion is only about one percent for every 15 degrees F. Moreover, storage tanks at gasoline stations are buried several feet underground, helping to insulate fuel and keep temperature relatively constant. The benefits, if any, of filling up in the morning versus the evening would be hard to notice.