Wynn's Gear Oil Treatment is a manual gearbox treatment which improves gear shifting, lowers gearbox noise and stops oil leaks. Improves anti-friction and anti-wear properties. Reduces wear caused by metal-to-metal contact (reinforces E.P. additives in gearbox oils). Eases shifting. Provides a hydrodynamic lubrication, also under high charges and at high temperature. Prevents and reduces vibration noises of gears and bearings. Lowers cold temperature viscosity to provide immediate lubrication at cold start. Stops and prevents oil leaks. Compatible with all synthetic and mineral based gearbox oils (also ATF Dexron, Mercon) and hydraulic fluids.