Automotive gear oil is a type of lubricating oil specifically used in automotive transmission systems. It is mainly used to lubricate gear transmission mechanisms such as manual transmissions, rear axle main reducers, and differentials in automobiles. Automotive gear oil has the characteristics of appropriate viscosity, good extreme pressure and wear resistance, excellent anti-oxidation stability, and thermal stability. It can form an oil film during the gear transmission process, effectively preventing wear, bonding, and corrosion between tooth surfaces. At the same time, it helps to dissipate heat from the gear, reduce tooth surface impact and noise, thereby extending the service life of the gear and ensuring the normal operation of the automotive transmission system.