SUPETRO LP 6391 is a versatile gear oil additive package designed for both automotive and industrial applications when combined with suitable base oils. Formulated with highperformance extreme pressure agents, anti-wear additives, and rust and corrosion inhibitors, it ensures exceptional protection, thermal stability, and oxidation resistance, making it ideal for demanding environments. For automotive gear oils, a 3.8% treat rate allows SUPETRO LP 6391 to meet the requirements of API GL-5 heavy-duty specifications, including CRC L-42, CRC L-33-1, CRC L-37-1, and CRC L-60-1. For API GL-4 applications, a treat rate of 1.8% is recommended. Additionally, it is well-suited for industrial closed gear oils, with an optimal treat rate of 1.0–1.5% for mid to heavy-duty applications.