Rock Oil Factory ECO Foam air filter oil is a synthetic water washable air filter fluid which has been developed as an easy to use high performance lubricant for foam air filters. Most air filter lubricants require further cleaning products to remove the oil incurring extra cost and time when preparing filters. Factory ECO Foam has removed this inconvenience meaning cleaning and preparing filters is quick and easy. Developed with the environment in mind; it is a non-mineral, water soluble fluid that can be safely washed away down drains. Water Soluble•Eco-Friendly•Available In thre Sizes•As Used By The Best Teams In The World