Film thickness greater than an SAE 75W250, yet low fluid friction like 75W90. For heavily-loaded racing differentials and transmissions, problem gearboxes. Many performance racing applications like Sprint/Midget/Dirt Late Model Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear ends. Not recommended for most synchro applications due to the product’s extreme slipperiness. Unique lubricant with solid microscopic particles offers low drag/high protection. Relatively low viscosity, yet cushions gear teeth under extreme pressure. Helps to prevent tooth breakage, resists throw-off. Avoid use with pumps, coolers, and filters as unique medium and affinity for metal can cause clogging. 1 Quart.