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For every 5 mph that you drive over the 60 mph mark you are adding an extra 10 cents onto each gallon of gas that you purchase. Under-inflated tires wear out faster, which again contributes to higher gas consumption. The following products have been tested by the Environmental Protection Agency (EPA):Air Bleed Devices.

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ca/transportation/tools/fuel-trip-calculator/fuel-calculator-input. The cleaner that your fuel filter is the more efficiently your vehicle is going to run, saving you more money in fuel costs. Keep your gas level above the quarter tank mark if at all possible. Keep your gas level above the quarter tank mark if at all possible. fueleconomy.