The air filter is one of those parts that can be easily overlooked, but should not be forgotten. The air filter plays an important role in preventing dirt and dust from clogging up the engine’s cylinders. A clogged engine cylinder can cause mechanical wear and tear and can contaminate the oil. Also, a clogged air filter can affect the emissions system, which regulates the air-fuel mixture and impacts gas mileage. Scheduling regular preventative maintenance will be vital to keeping air filters clean and functional.