Maxima's semi-synthetic foam air filter oil was designed through a 3-year development program to maximize the collection of particulates and contaminants while ensuring optimal air flow. Unique formulation utilizes a proprietary blend of synthetic polymers to allow up to 12% more air flow than competitive formulations while stopping up to 8% more contaminants. Extensively developed formulation resists water, gasoline "fogging" and will not dry out. Safe for use on all foam air filters.