Air filter is an element that people do not pay much attention to. Their biggest concern is oil changes, perhaps checking the coolant, and then forgetting the engine filter that prevents entry of dirt to the engine. Nonetheless, clean air is important as the engine breathes. And as it breathes foul air, it decreases performance, fuel burns sloppy & Parts wear faster. This is why Air F... https://carengineguru.com/air-filter-inspections-what-does-your-filter-inspection-include/