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Using gasoline pollutes our environment and depletes the oil reserves in our earth. But everyone can improve the gas mileage that their car gets and save money in the process. Here are five ways to improve the fuel efficiency of your auto.

CHANGING PARTS
Simple changes, like swapping on a high-performance air filter and changing to a less restrictive muffler or exhaust system, helps and engine produce more power and become more efficient. Improving a vehicle's ignition system also can make the engine more efficient, so it needs less fuel and performs better. And remember, while these changes cost money you will be saving money in the long term by spending less on gas. You can't afford not to make these changes.

FREQUENT MAINTANENCE
Good engine and tire maintenance are essential to good fuel economy. Hundreds of dollars a year can be saved just by keeping the vehicle's engine tuned and tires inflated to the proper pressure.

KEEP THE SPEED DOWN
Driving at a consistent speed is one way to improve gas mileage, so use cruise control if you have it. And reducing your speed limit by 5 miles an hour on average can save you hundreds of dollars on fuel per year.

KEEP TO THE HIGHWAY
Highway driving is much more efficient than in city driving, so stick to the highways whenever possible. Also, try to avoid rush hour traffic. The stop and go driving of rush hour is a real fuel guzzler.

USE YOUR FANS NOT YOUR AIR CONDITIONING
The use of an air conditioner puts a sifnificant dent in your car's fuel efficiency. If the temperatures aren't too bad, consider using just your cars fans to blow in outside air. Note - Some studies show that driving with all your windows down actually brings your mileage down more than just using the a/c due to the drag and wind resistence effects created when the windows are down.

Other waves to save fuel include, choosing smaller, fuel efficient cars when you buy, trading in old cars for newer, more fuel efficient models, and maintaining your car with scheduled tune ups.