Friction/ Braking
May 12, 2021
Engine Cooling
May 12, 2021

An air filter catches all the above-mentioned crud long before it can get to the engine. Often, the filter will be protected in a plastic box, to even further guard the engine from contaminants. If you let an air filter get too dirty, it will starve the engine of air, which the combustion process needs to make power most efficiently. Theoretically, an air filter could get so dirty that the engine wouldn’t run. But what’s more likely is that a dirty air filter will deprive the engine of just enough air to hamper performance. Research with modern, fuel-injected cars shows that a filthy air filter can significantly rob an engine of power, but won’t affect fuel economy all that much