Internal parts of stored engines can rust in as little as 30 days without protection. Also, cylinders dry out during storage resulting in possible permanent engine damage at start up. STA-BIL fogging oil protects internal engine surfaces from corrosion and lubricates cylinders to prevent engine damage after storage. Safe to use on all 2 and 4 cycle engines and fuel injected engines. Coats internal engine parts to prevent corrosion For all 2-cycle and 4-cycle gasoline engines Displaces moisture from metal to prevent corrosion Specially formulated to go deep into the engine, seeking metal surfaces to form a protective coating Lubricates cylinders to prevent damage at start up