Lubricating oil composition

A lubricating oil composition comprising:

• (A) a lubricant base oil;
• (B) an alkaline earth metal detergent, wherein the amount of the alkaline earth metal is 10 ppm or more by mass and 1000 ppm or less by mass on the basis of the total amount of the lubricating oil composition;
• (C) 0.005% or more by mass and 0.90% or less by mass of a triazole-based compound represented by the following general formula (1) or (2), on the basis of the total amount of the lubricating oil composition:
• wherein R1 is a hydrogen atom or a methyl group, and R2 and R3 are each independently a hydrogen atom or a linear or branched hydrocarbon having 1 to 18 carbons,
• wherein R4 is a hydrogen atom or a methyl group, and R5 and R6 are each independently a hydrogen atom or a linear or branched hydrocarbon having 1 to 18 carbons;
• (D) at least one sulfur-containing compound selected from the group consisting of a sulfur-containing heterocyclic ether compound and a sulfide compound, wherein the amount of sulfur is 10 ppm or more by mass and 2000 ppm or less by mass, on the basis of the total amount of the lubricating oil composition;
• and
• (E) 0.010% or more by mass and 4.0% or less by mass of an ashless dispersant on the basis of the total amount of the lubricating oil composition.