▎ 摘　　要

NOVELTY - Lubricating oil composition comprises 1-3 wt.% composite anti-rust agent, 1-4 wt.% extreme pressure anti-wear agent, 1-5 wt.% antioxidant, 0.1-1 wt.% auxiliary additive and the rest of base oil. The anti-rust complexing agent comprises sodium petroleum sulfonate, tall oil acid triethanolamine and histidine. The mass ratio of sodium petroleum sulfonate, tall oil acid triethanolamine and histidine is sodium petroleum sulfonate. tall oil acid triethanolamine: histidine is 8-20: 2-10: 0.3-5. USE - Lubricating oil composition for automobile. ADVANTAGE - The lubricating oil composition effectively prevents the device rusting and corrosion, so as to prolong the service life of the device DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing lubricating oil composition, which involves mixing the auxiliary additive with base oil uniformly, ball milling to obtain mixture 1, adding the composite anti-rust agent, antioxidant, extreme-pressure antiwear agent into the mixture 1 at 60-90degrees Celsius, and stirring for 1-3h to obtain the lubricating oil composition.