▎ 摘　　要

NOVELTY - An engine oil additive is prepared by mixing nano-oxide composite material modified by graphene, dispersant, lithium-based grease and base oil in mass ratio of 0.5-3:1.5-7:10-18:80-90. USE - Engine oil additive. ADVANTAGE - The engine oil additive prepared by combining the layered perovskite material and graphene, which can lower the engine oil temperature and extend the service life of the engine oil. The modified nano-oxide composite material is applied to the engine oil additive, thereby improving the high-temperature lubrication performance of the engine oil additive. The nano-oxide is a layered perovskite material, which has excellent high temperature resistance and high temperature lubricity. The layered perovskite material can effectively improve the extreme pressure performance and the anti-wear and anti-wear performance of the engine oil additive under various working conditions, and can reduce the wear of the friction surface at high temperatures, thereby extending the service life of the oil additive. The graphene provides high thermal conductivity to the engine oil additive.