| abstract |
PROBLEM TO BE SOLVED: To provide a lubricating oil composition for an internal combustion engine suitable for a gasoline cylinder direct injection engine, which suppresses catalyst poisoning of a NOx storage type catalyst and also reduces intake valve deposits. (A) A kinematic viscosity at 100 ° C. of 3.5. １10.0 mm 2 / s, total sulfur content 0.005 Mass% or less and a total aromatic content of 10 mass% or less to a base oil composed of mineral oil and / or synthetic oil, based on the total amount of the composition, (B) polybutenyl succinimide and / or a derivative thereof in an amount of 0.01 to 0.2% by mass in terms of a nitrogen element; 0.3 mass% or less of zinc dithiophosphate in terms of sulfur element, (D) 0.1-5.0 mass% of phenolic and / or amine ashless antioxidant, (E) alkaline earth metal The detergent is used in an amount of 0.1 to 0.1 in terms of an alkaline earth metal element. A lubricating oil composition for an internal combustion engine, comprising 3% by mass and (E) substantially not containing a viscosity index improver. |