公开(公告)号：US20230183591A1

公开(公告)日：2023-06-15

申请号：US17845285

申请日：2022-06-21

Applicant: ENEOS CORPORATION

Inventor： Kohei SASAKI ,  Hideo TSUNEOKA ,  Kotaro WADA

IPC: C10M125/26 ,  C10M101/02 ,  C10M169/04

CPC classification number: C10M125/26 ,  C10M101/02 ,  C10M169/04 ,  C10M2201/102 ,  C10M2201/087 ,  C10M2207/003 ,  C10N2010/04

Abstract: A lubricating oil composition for an internal combustion engine includes: (A) a lubricating base oil including at least one mineral oil-based base oil and having a kinematic viscosity at 100° C. of from 2.0 mm2/s or more and 4.3 mm2/s or less, and (B) a calcium borate-containing metallic detergent in an mount of 500 mass ppm or more and less than 1500 mass ppm in terms of calcium, based on a total amount of the composition. The composition has an evaporation loss by NOACK method (250° C., 1 h) of from 10 mass % or more and 40 mass % or less, and the composition has a viscosity index of from 140 or more and 350 or less. The lubricating oil composition is provided, wherein even in the case of using a highly evaporative base oil to make the viscosity low, the friction characteristic of the lubricating oil composition can be kept low.