Unifilter's foam filter oil is the only 100% mineral based filter oil left on the market. There simply is no better foam filter oil available. Mineral based foam air filter oil does not contain any harsh chemicals or solvents that can affect the foams and glues used to manufacture foam air filters. Mineral Based filter oils also have the added benefit of not drying out like synthetic foam filter oil can. If you want the best protection for your engine there is no better foam air filter oil available.
