Doill Gearmax 75W80 is a fully synthetic manual transmissions oil. It is formulated with top quality, highly refined base oils and an advanced additive system that provides enhanced shifting, all weather performance, and a high level of gear and synchroniser protection. The stability and reliability built into Doill Gearmax 75W-80 makes it the right choice for applications requiring API GL-4/GL-5 service requiring a SAE 75W-80 viscosity grade.