Quote:
Originally Posted by mrrab
...but how often should you replace your air filter?
...just curious as to what others do. .
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Depends on the reason you want to replace it.
A dirty one shouldn't affect gas mileage and should actually filter a little better than new, but at some point it will affect power/acceleration.
Fram, who wants to sell as many filters as possible, recommends 12,000 miles. That should tell you something.
It looks like I've averaged about 22k per filter. The truck lives in a dusty desert and has seen about 5k of off-pavement miles.