Modern engines use 10,000 units of air as the engine uses in fuel so it is important to operate the engine with a clean engine air filter. A dirty air filter acts like a drain that is partially blocked. The old filter can restrict air inflow and allow damaging dirt and debris to enter the engine. A new filter can increase fuel economy up to 8% or more while restoring performance and throttle response to your engine. Change your engine air filter today and experience the difference