| abstract |
This lubricant composition for an internal combustion engine is formed by adding an overbased calcium sulfonate and/or an overbased calcium phenate (A) having a TBN of 200 mgKOH/g or more, a predetermined binuclear and/or trinuclear organic molybdenum compound (B), and a polyalkyl (meth)acrylate (C) having an SSI of 30 or less to a lubricant base oil comprising a mineral oil and/or a synthetic oil, wherein the sum of the molybdenum content derived from the binuclear and trinuclear organic molybdenum compound is 0.025 mass% or more relative to the entire composition, the HTHS at 100°C is between 4.0 and 5.0 mPa∙s, the HTHS at 150°C is 2.5 mPa∙s or lower, and the NOACK vapor amount (250°C, one hour) is 15 mass% or less. |