| abstract |
The present invention provides a lubricating oil composition which can have electrical insulating properties, anti-sintering properties and wear resistance in a well-balanced manner. The lubricating oil composition of the present invention is characterized by comprising: (A) a lubricating oil base oil; (B) an alkaline earth metal based on the total amount of the lubricating oil composition in an amount of 10 to 1000 ppm by mass of the alkaline earth metal. Cleaning agent; (C) 0.005% by mass to 0.90% by mass of a triazole-based compound represented by the following general formula (1) or (2) based on the total amount of the lubricating oil composition, the general formula (1) (formula wherein, R 1 is a hydrogen atom or a methyl group, and R 2 and R 3 are each independently a hydrogen atom or a linear or branched hydrocarbon having 1 to 18 carbon atoms.), the general formula (2) (wherein , R 4 is a hydrogen atom or a methyl group, R 5 and R 6 are independently a hydrogen atom or a linear or branched hydrocarbon with 1 to 18 carbon atoms.); (D) based on the total amount of the lubricating oil composition At least one sulfur-containing compound selected from the group consisting of sulfur-containing heterocyclic ether compounds and sulfide compounds, and (E) the total amount of the lubricating oil composition 0.010 mass % to 4.0 mass % ashless dispersant on a basis. |