100% Synthetic lubricant for mechanical transmission. This product was specially designed for high performances and racing cars fitted with mechanical transmission, synchronized or not, differential, transfer gearboxes and hypoid differentials without limited slip system operating under shocks, heavy loads and low revolution speed or moderate loads and high revolution speed requiring API GL-4 and GL-5 / MIL-L-2105D standards. This product is an synthetic extreme pressure lubricant for an efficient anti-wear protection, a better resistance at high temperature and a longer life time. Its very high lubricating power decreases friction and wear and lower the effort made on the lever to switch gears even when it is cold. this viscosity grade (90) helps providing an outstanding oil film resistance at hot temperature and/or to reduce transmission noise. It ensures 0% shear loss : Unshearable oil film in extreme conditions. Suitable for any type of seal and yellow material used in gearboxes design. 100% Synthetic ? Ester based; Lubricant for gearbox and limited slip differential integrated or not in the gearbox Oil change: According to manufacturers requirements and adjust according to your own use.