▎ 摘　　要

NOVELTY - Graphene engine oil comprises 0.03-0.09 wt.% nanographene, 0.015-0.03 wt.% dispersant and remaining amount of base oil. USE - Used as a graphene engine oil. ADVANTAGE - The graphene engine oil: changes sliding friction into rolling friction; and reduces frictional resistance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing graphene oil comprising (a) injecting base oil into the stirring equipment and adding dispersant to the base oil, and stir at medium speed for 30 minutes, (b) adding nano-graphene to base oil at a constant speed, stirring at high speed with multi-stage high-speed disperser for 2 hours, allowing to stand for 30 minutes, continuing to stir for 2 hours and obtaining finished product after the system is stable; and graphene oil stirring device comprising stirring device including a stirring tank, the top of the stirring tank is provided with an upper motor and a feeding port, the bottom of the stirring tank is provided with a lower motor and a discharging port. The upper motor is driven and connected to the upper stirring rod. and the lower motor is connected to the upper stirring rod. The drive is connected to the lower stirring rod. The lower end of the upper stirring rod is embedded in the top of the lower stirring rod. The two are gap-fitted and an upper stirring blade is arranged on the outside of the upper stirring rod. A lower stirring blade is arranged on the outside of the lower stirring rod, and the upper stirring blade and the lower stirring blade are both of a bifurcated structure, and the two are arranged in a staggered position. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the stirring device.