When Should You Change the Engine Air Filter?
The air filter keeps dust out of the engine. A dirty one chokes airflow, weakens performance and raises fuel use.
Why it matters
The engine needs enough clean air. A clogged filter reduces air and upsets the mixture, raising fuel use and cutting torque.
Signs of fouling
Weak acceleration, higher fuel use, a grey/clogged-looking filter on inspection, or faster fouling in dusty environments.
The interval
It varies by model and environment — dusty climates need earlier changes. Check your manual; a visual check is a practical guide.
FAQ
Clean it instead of replacing?
Paper filters are usually replaced; some washable cloth filters are cleaned per the maker's instructions.
Does the air filter affect fuel?
Yes — a clogged filter can raise fuel use and weaken performance; timely changes save money.