Mineral lubricant reinforced with Molybdenum bisulphide (MoS2) to handle heavy loads and reduce transmission noises. All mechanical transmission, synchronized or not synchronized gearboxes, gearboxes/differentials, transfer boxes and hypoid differentials without limited slip system operating under shocks, heavy loads and low revolution speed or moderate loads and high revolution speed. Very high lubricating power decreases friction and wear. SAE 90 viscosity grade at high temperatures to provide outstanding oil film resistance at high temperatures.