| abstract |
(57) [Summary] (Modified) [Purpose] Lubricant additive (ashless detergent) useful for oil for diesel engines and methanol engines that comply with future emission regulations, high temperature stability (high temperature detergency) (EN) Provided are an additive composition for lubricants, which is excellent as an ashless detergent dispersant having a fine particle dispersing action, and a lubricating oil composition containing the additive for lubricants. [Structure] General formulas (I) and (II) [For example, (hexylhydroxybenzoic acid) hexylphenyl ester] [For example, (hexyl hydroxynaphthoic acid) hexyl phenyl ester] represented by a substituted hydroxyaromatic carboxylic acid ester derivative, at least one lubricant additive, and (a) this lubricant additive And an additive composition for a lubricant containing (b) an ashless dispersant, and a lubricating oil composition comprising a lubricant base oil containing the additive for a lubricant. |