| abstract |
[PROBLEMS] To provide a lubricating oil composition suitably used for a diesel engine using a low sulfur fuel. SOLUTION: In a low sulfur base oil, a) succinimide-based ashless dispersant is contained in a nitrogen content of 0.01 to 0.3% by weight, b) Total base number 10 to 350 m with a sulfur content of 3.5% by weight or less gKOH / g of metal-containing detergent is 0.1 to 1 in terms of sulfated ash. % By weight, c) 0.01 to 0.1% by weight of phosphorus content of zinc dialkyldithiophosphate, d) 0.002 to 0.05% by weight of zinc content of zinc dialkylaryldithiophosphate, e) Antioxidation As an agent, a phenol compound, an amine compound and / or a molybdenum compound are added in an amount of 0.01 to 5% by weight, and the ratio of c) to d) is 20: 1 to 2: 1 and a sulfated ash content of 0.1 to 1% by weight, a phosphorus content of 0.01 to 0.1% by weight, a sulfur content of 0.01 to 0.5% by weight, A lubricating oil composition containing 0.2 to 7% by weight of an organic acid metal salt contained in the contained detergent. |