Your engine's air filter is the first line of defense against dust, dirt, and debris entering the combustion chamber. A dirty air filter restricts airflow — and a restricted engine is a less efficient, less powerful engine. Here's what you need to know.
What an Air Filter Does
Every internal combustion engine requires a precise mixture of air and fuel. The air filter ensures that the air entering the engine is clean. Without it, abrasive particles would score cylinder walls, wear piston rings, and contaminate engine oil.
Signs Your Air Filter Needs Replacement
- Noticeably reduced acceleration or throttle response
- Decreased fuel economy (a restricted air supply forces a richer fuel mix)
- Rough idle or misfires (caused by improper air-fuel ratio)
- Black exhaust smoke (excess fuel not burned due to insufficient air)
- Visible dirt when you pull the filter out and hold it up to light
Replacement Interval
Most manufacturers recommend replacing the engine air filter every 15,000–30,000 miles. However, if you drive on dirt or gravel roads regularly, live in a dusty environment, or frequently drive behind other vehicles on unpaved surfaces, inspect and replace more frequently.
DIY Replacement
Air filter replacement is one of the easiest DIY jobs there is. In most vehicles, it takes less than 5 minutes with no tools. Open the air box, remove the old filter, install the new one. Done.
Shop air filters and other maintenance parts at Texan Supply with free shipping.