G-PLUS 90 GL-1 is the perfect combination of premium mineral bases with the most advanced rust inhibitors, corrosion, and foam to meet the requirements of API GL-1. It is designed to be used in manual transmission and differential gear systems, only for the old generation. This mixture ensures maximum protection offering superior viscosity and temperature stability, long life of all components and parts. GL-1 gear oils do not contain friction modifiers or extreme pressure additives.