| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant composition for internal combustion engines, which can maintain high temperature cleanliness and does not deteriorate abrasion resistance, even when largely reducing a phosphorus-containing additive and a metal-based cleaner.SOLUTION: A lubricant composition for internal combustion engines comprises a base oil, a sulfur-containing heterocyclic compound represented by general formula (I), and an aminoalcohol compound having one or more amino groups and one or more hydroxyl groups in the molecule, and has a phosphorus content of 0.03-0.06 mass% and a sulfuric acid ash content of <0.3 mass% on the basis of the total amount of the composition. (Wherein, As is a sulfur-containing heterocyclic group; Rand Rare each independently H, amino, 1-50C hydrocarbon group selected from alkyl, cycloalkyl, alkenyl, cycloalkenyl and aryl, or, 1-50C heteroatom-containing group containing an atom selected from oxygen atom, nitrogen atom and sulfur atom in the hydrocarbon group, when these are each a hydrocarbon group; k, l, m and n are each independently an integer of 0-5). |
