Change Your Car's Dirty Air Filter             

Your car's air filter protects your car's engine by keeping dirt out. In the process, it gets progressively dirtier itself which gradually reduces the amount of air it allows to pass through into your engine's carburator. If your carburator does not get the correct amount of air to mix with your gasoline in the cumbustion process, your car's fuel efficiency will suffer.

How often should you change your automobile's air filter? That depends a little bit on whether you drive frequently on dusty, dirty roads or if your daily commute is relatively dust-free. A good rule of thumb is to change it about every 15,000 miles. For many people, that will translate to about 15 months. If you drive long distances each day or you drive on particularly dirty roads, plan on replacing your air filter once each year. If you accrue milage slowly or steer clear of dusty, unpaved roads then you can stretch that out to an 18-month replacement cycle.

These estimates are based on the assumption that standard, disposable air filters are being used. There are filters that need not be changed as frequently. They are sometimes referred to as "lifetime" air filters and may be worth your time to research if you plan to keep your current vehicle for the foreseeable future.

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