▎ 摘　　要

NOVELTY - Modified lubricating oil comprises a base lubricating oil and nano copper/sulfur doped graphene powder, where the weight of nano-copper/sulfur-doped graphene powder is 0.0035-0.25 wt.% base lubricating oil. The modified lubricating oil prepared by stirring the base lubricating oil, stirring and adding nano-copper/sulfur doped graphene powder, stirring and ultrasonically dispersing to obtain the product. USE - Used as modified lubricating oil. ADVANTAGE - The lubricating oil: is simple and economical; has high-efficiency, low-valence, good effect, and reliable preparation technique; and improves self-repairing and extreme pressure lubricating protection performance by self-repairing. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing modified lubricating oil comprising stirring base lubricating oil at 50-65 degrees C, stirring speed is 4000-7000 revolutions/minutes for 10-15 minutes, stirring and adding nano copper/sulfur doped graphene powder, stirring, ultrasonically processing and dispersing, temperature is 50-65 degrees C, stirring speed is 8000-12000 revolutions/minutes, the ultrasonic frequency is 15-25 kHz, dispersing for 15-40 minutes to obtain the finished product.