abstract |
A lubricating oil composition including: a lubricant base oil; (A) a calcium salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of calcium on the basis of the total mass of the composition; and (B) a phosphite ester compound represented by the following general formula (1) in an amount of 0.01 to 0.06 mass % in terms of phosphorus on the basis of the total mass of the composition:wherein in the general formula (1), R1 and R2 are each independently a C5-20 group represented by the following general formula (2):wherein in the general formula (2), R3 is a C2-17 linear chain hydrocarbon group, and R4 is a C3-17 linear chain hydrocarbon group, and X1 is an oxygen atom or a sulfur atom. |