Auto »Air filterPrevious5 of 6Next© Joe Belanger/Shutterstock.com"Air filterDIY difficulty: EasyFunction: It filters the air coming into the engine. Dirty filters reduce gas mileage, especially on cars that are 10 years or older.Previous5 of 6Next
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© Joe Belanger/Shutterstock.com"
DIY difficulty: Easy
Function: It filters the air coming into the engine. Dirty filters reduce gas mileage, especially on cars that are 10 years or older.
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