This 75W85 GL-4 gear oil is designed to fill the viscosity gap between MTL (70W80 GL-4) and MT-90 (75W90 GL-4), making it a perfect fit for many Nissan, Mitsubishi, Hyundai, Kia and NV4500 pickup truck transmission applications. MT-85 provides superior gear and synchronizer protection, while its balanced slipperiness provides an improved coefficient of friction for easier shifting over a range of temperatures. This product is safe for brass synchros, as it lacks the damaging, reactive sulfurs found in most GL-5 oils. MT-85 satisfies the gear oil viscosity requirements of 75W and 85W as well as SAE 30 and 5W30 motor oil viscosities. Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified.