Abstract: Lubrication characteristics of transmission system and the standard of General Motors were analyzed in order to understand the lubrication requirements for pure electric passenger vehicles. The oil was mixed with base oil of API Ⅲ+ hydrogenated mineral oil, ester oil and extreme-pressure and anti-wear additives, metal passivator, anti-rust, ashless dispersant. The physical-chemical and friction tests showed that the oil had good properties of thermal oxidation stability, shear stability, insulation, anti-rust and anti-corrosion, extreme-pressure and anti-wear additives, anti-friction. The oil performance is superior to the automatic transmission oil used in an electric passenger car.

Key words: electric passenger vehicle, transmission system, lubricating oil, anti-wear additive