The engine air filter cleans the air before entering the engine to mix with the fuel to ignite. Many people wonder how often they should change their engine air filter. The simple answer is “when the filter is dirty.” Your manufacturer will recommend a mileage interval for replacing the air filter, but how polluted the air is affects how quickly the filter becomes packed with dirt.
If you drive where there is much dust, pollution, or pollen, your engine air filter may need to be changed sooner. That is why we visually check the air filter with every full-service oil change.
Your filter can only hold so much dirt. When the filter is full, air can become blocked and dirt can pass through to the engine. The contaminants can encrust and impede the combustion chamber, which can affect fuel economy and cause damage. The excess dirt can also contaminate the Mass Air Flow (MAF) Sensor, which can affect drivability and may need to be replaced.
A dirty air filter can restrict the amount of air to the engine, which also hurts fuel economy. We can replace your engine air filter with one that matches the factory specifications or you can upgrade your filter for enhanced performance. You now know the importance of replacing the engine air filter, especially when your service advisor shows you that dirty air filter.