75W-80

The designation 75W‑80 in the SAE J306 system defines the viscosity of transmission oil: the number 75 W indicates the cold viscosity, i.e., the oil’s ability to remain fluid at low temperatures, and the number 80 denotes the viscosity at 100 °C, providing a sufficient protective film under high load. This oil is intended for manual gearboxes, rear differentials, front transfer cases and transfer cases of passenger and commercial vehicles, as well as for heavy trucks where high resistance to compression and synchronizer wear is required. High anti‑wear capability and stable viscosity across a wide temperature range ensure smooth gear shifts, corrosion protection, and noise reduction. XENUM X‑TRAN 75W‑80 GL‑4/5 oil meets API GL‑4 and GL‑5 specifications, making it compatible with both conventional and modern transmissions, including systems with increased torque. When selecting a replacement, you can consider other products with a viscosity of 75W‑80 or 80W‑90, which remain compatible outside the manufacturer’s recommendations.