LIQUI MOLY – LIQUI MOLY Oil System Additives, including MoS2 Anti-Friction Engine Treatment, MoS2 Anti-Friction Motor Oil 10W40 and 20W50, MoS2 Antifriction For Gears, Viscoplus For Oil, and Long-Life Grease + MoS2. Molybdenum disulphide is the chemistry that made this brand famous, and this shelf is where it appears in its most concentrated form. MoS2 is a solid lubricant that bonds to metal surfaces and keeps working in the boundary conditions where liquid oil film is thinnest: cold starts, high loads, cam lobes and cylinder walls at the top of the stroke. The 300mL MoS2 Anti-Friction Engine Treatment is added to existing oil to build that protective layer, typically quietening a tired valvetrain and reducing wear in higher-mileage engines. For those who prefer it built in, MoS2 Anti-Friction Motor Oil in 10W40 and 20W50 arrives pre-blended in 1L and 5L sizes. MoS2 Antifriction For Gears carries the same idea into manual gearboxes and final drives where sliding tooth contact generates real heat, while the 100g and 400g Long-Life Grease + MoS2 protects wheel bearings, pivots and chassis points under shock loading.