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1.Keep your car in tune. Following your owner’s manual’s recommendation for tuning your car, can increase your gas mileage by 4 percent . Fixing serious problems such as a faulty oxygen sensor can improve your gas mileage by as much as 40 percent.
2.Keep your tires plump. A under inflated tire can lower your gas mileage by 0.3 percent for every psi drop in pressure for all 4 tires. Properly inflated and aligned tires can increase gas mileage by as much as 3 percent.
3.Using the recommended grade of motor oil can improve gas mileage by 1-2 percent. Also using motor oil that says “Energy Conserving” on the America Petroleum (API) performance symbol contains friction-reducing additives that can improve fuel economy.
4.A study performed by the Energy and Transportation Science division at the Oak Ridge National Laboratory indicates that replacing clogged filters on cars with fuel injected, computer controlled gasoline engines does not improve gas mileage. However, acceleration time is increased from 6 to 11 percent. Changing the air filter on carbureted engines can increase fuel economy by up to 14 percent depending on the condition of the car.
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