![]() ![]() Have the fuel filter changed every 10,000 miles to prevent rust, dirt and other impurities from entering the fuel system.Worn belts will affect the engine performance. Look for cracks or missing sections or segments. ![]() A fouled spark plug or plugged/restricted fuel injector can reduce fuel efficiency as much as 30 percent. Using cruise control on highway trips can help you maintain a constant speed and, in most cases, reduce your fuel consumption. For example, driving at 65 miles per hour (mph) rather than 55 mph, increases fuel consumption by 20 percent. The faster you drive, the more fuel you use. Contrary to popular belief, restarting the car uses less fuel than letting it idle. If you anticipate being stopped for more than one minute, shut off the car. Wide-open windows, especially at highway speeds, increase aerodynamic drag and the result is up to a 10% decrease in fuel economy. The air conditioner puts extra load on the engine forcing more fuel to be used. Heavier vehicles use more fuel, so clean out unnecessary weight in the passenger compartment or trunk before you hit the road. Under-inflated tires make it harder for your car to move down the road, which means your engine uses more fuel to maintain speed.
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