▎ 摘　　要

NOVELTY - A lubricating oil additive comprises 0.5-1 pt. wt., preferably 1 pt. wt. graphene, 82-88.5 pts. wt., preferably 87 pts. wt. T326 (pentadecyl phenyl sulfonate), 10-15 pts. wt., preferably 10 pts. wt. alkylbenzene, and 1-2 pts. wt., preferably 2 pts. wt. dispersant. USE - Additive is used for lubricating oil (claimed). ADVANTAGE - The additive improves extreme-pressure property and antiwear property of lubricating oil, contributes to energy-saving and reduction in consumption of lubricating oil, and prolongs the service life of equipment. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of lubricating oil additive, which involves mixing T326, alkylbenzene and dispersant, heating to 60 degrees C, stirring for 20 minutes, adding graphene to the mixture, mixing, then mixing ultrasonically for 30-50 minutes at 50-70 degrees C and 40 kHz, pouring the mixture into a colloid mill, and grinding at 60-80 degrees C for 60-90 minutes; and (2) lubricating oil comprising 98.5-97.7 pts. wt., preferably 98 pts. wt. lubricant and 1.5-2.3 pts. wt., preferably 2 pts. wt. lubricating oil additive.