| abstract |
(57) [Summary] [Problem] To be excellent in friction loss reduction of an internal combustion engine of an automobile, And its performance lasts for a long time, especially EGR Provided is a lubricating oil composition for an internal combustion engine, which is suitable for a pressure-accumulation (common rail) type diesel engine and is equipped with a lubricating oil composition. SOLUTION: A base oil composed of a mineral oil and / or a synthetic lubricating oil, based on the total amount of the composition, is at least (A) at least one selected from the group consisting of sulfurized oxymolybdenum dithiocarbamate, sulfurized oxymolybdenum dithiophosphate, molybdenum phosphate, and molybdenum amine complex. At least one chosen Kinds of organic molybdenum compounds at a Mo concentration of 0.01-0. 20% by weight, (B) 0.01 to 0.50% by weight of zinc dialkyldithiophosphate in P concentration, and (C) 0.05% of Ca salt or Mg salt of alkyl salicylic acid in Ca or Mg concentration. To 1.0% by weight, and (D) Zn of alkyl salicylic acid. An internal combustion engine, particularly an exhaust gas recirculation system (EG), characterized by containing a salt in a Zn concentration of 0.005 to 0.2% by weight. (R) equipped with a pressure-accumulation (common rail) type lubricating oil composition for diesel engines. |