▎ 摘　　要

NOVELTY - A lubricating oil composition comprises 80-100 pts. wt., preferably 92 pts. wt. base oil, 0.4-0.8 pt. wt., preferably 0.6 pt. wt. ethylene-propylene copolymer, 0.5-1 pt. wt., preferably 0.8 pt. wt. trimethylolpropane oleate, 0.5-1.2 pts. wt., preferably 0.9 pt. wt. triethanolamine oleate, 2-6 pts. wt., preferably 4 pts. wt. modified graphene oxide, 1-5 pts. wt., preferably 3 pts. wt. alkyl naphthalene, 0.3-1 pt. wt., preferably 0.7 pt. wt. polymethacrylate, 5-15 pts. wt., preferably 10 pts. wt. dimethoxyethane, 1-6 pts. wt., preferably 4 pts. wt. tetrahydronaphthalene, and 1-3 pts. wt., preferably 2 pts. wt. zinc dialkyldithiophosphate. USE - Lubricating oil composition is used in preparation of lubricant (claimed). ADVANTAGE - The lubricating oil composition has excellent antirust effect provided by the synergistic effect of modified graphene oxide and zinc dialkyldithiophosphate, and the use of ultrasonic-microwave combination reaction, which provides excellent mixing effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the lubricating oil composition, which involves adding ethylene-propylene copolymer, trimethylolpropane oleate, triethanolamine oleate, alkyl naphthalene, polymethacrylate, dimethoxyethane, and tetrahydronaphthalene to base oil, mixing, subjecting to ultrasonic-microwave combination reaction at 50-80 degrees C, ultrasonic frequency of 50 kHz, ultrasonic power of 40-100 W, microwave frequency of 2000 MHz, and microwave power of 40-100 W for 6-16 minutes, adding modified graphene oxide and zinc dialkyldithiophosphate, stirring mechanically for 8-20 minutes at 900 rpm, and filtering.