Your engine needs a steady supply of clean air to burn fuel properly. The engine air filter sits at the entrance to the intake system and traps dust, pollen, sand, insects, and other debris before they can reach the throttle body, sensors, cylinders, and other internal components. There is no single replacement interval that works for every vehicle. Some manufacturers recommend a specific mileage, while others call for checking the filter periodically and replacing it when needed. Where you drive, how often you drive, and the design of the intake system can all change how quickly a filter becomes restricted. Start With the Manufacturer’s Schedule The owner’s manual is the best place to find the recommended service interval for your particular vehicle. Depending on the model, the filter may be scheduled for replacement somewhere around 15,000 to 30,000 miles, although some vehicles can go longer under favorable conditions. Mileage is only part of the pic ... read more