How do you know when your car air filter needs changing?

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asked Jan 11, 2020 in Repairs/Maintenance by Hollandy8213 (310 points)
How do you know when your car air filter needs changing?

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answered Jan 11, 2020 by Essmann (42,860 points)
A cars air filter should be changed yearly or every 12,000 to 15,000 miles depending on how many miles you drive per year and how dirty the conditions you drive in are.

If you drive in more dusty conditions then you may need to change the air filter every 3,000 miles or so but if not then yearly or every 12,000 to 15,000 miles is good enough to change the air filter.

If you notice a decrease in fuel mileage or loss of engine performance then check the air filter and if the air filter has not been changed in a year or more then it's likely time to change the air filter.

Air filters are pretty cheap and I change my air filters every year regardless of mileage just as preventative maintenance.

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