Patent ID: 7563751

Claim:
A lubricating oil composition, comprising: a lubricant base oil having a sulfur content adjusted to 0.1% or less by mass; and the following (A) incorporated into the base oil in an amount of 0.005 to 0.5% by mass of the total of the composition, the amount being an amount in terms of the metal element therein: (A) one or more alkali metal or alkaline earth metal salicylates in which the ratio (or percentage) of a salicylate constituent represented by the following general formula (1) is adjusted to 10% or more by mol, and/or one or more (over)basic salts thereof: wherein either one of R 1 and R 2 in the general formula (1) is an alkyl group which has 10 to 40 carbon atoms, and the other is a hydrocarbon group which has less than 5 carbon atoms (and may contain oxygen or nitrogen); and M represents an alkali metal or alkaline earth metal and n represents 1 or 2 in accordance with the valence number of the metal in the general formula (1).