No Toil Classic Foam Air Filter Oil No-Toil Air Filter Oil stands out as a premier choice in air filter oils for its exceptional 100 biodegradable formulation. This oil offers top-notch engine protection and effortless cleaning when used alongside No-Toil Biodegradable Air Filter Cleaner. Maintaining your air filter has never been safer or simpler. Features: Super tacky for better dirt adhesion in dusty conditions 100 biodegradable foam air filter oil Non-toxic, environmentally friendly Will not wash off in moist and humid weather