Frequently asked questions
What is the best thing to clean air filters with?
For foam and cotton performance filters, a dedicated air filter cleaning kit made up of a cleaner spray and filter oil is generally the safest option. Kits from brands such as Ramair, Pipercross and Eventuri are formulated to lift dirt and oil residue without damaging the filter media, then re-oil it to restore filtration efficiency. Household detergents or strong solvents can strip filter coatings or leave a residue that affects airflow, so a purpose-made cleaner is the safer bet.
Can you use WD-40 to clean an air filter?
WD-40 is not recommended for cleaning an air filter. It is a light lubricant rather than a proper filter cleaner, and it can leave a residue that clogs the filter media or stops re-oiling products from adhering properly afterwards. A dedicated air filter cleaner is formulated to break down dirt and oil safely before rinsing, so it is worth sticking with a purpose-built product instead.
Can I clean my air filter myself?
Yes, cleaning a foam or cotton performance air filter at home is straightforward with the right kit. Most cleaning kits involve spraying on the cleaner, leaving it to work, rinsing with water, letting the filter dry fully, then applying filter oil before refitting. Always follow the instructions for your specific filter brand, as application methods and drying times can vary quite a bit.
Is air filter cleaner worth it?
For reusable foam and cotton performance filters, cleaner is a worthwhile investment as it extends the filter's working life rather than needing a replacement every time it gets dirty. Regular cleaning, roughly every 5,000km depending on driving conditions, keeps airflow consistent and helps maintain engine performance. It works out as a lower running cost than repeatedly buying disposable paper filters.