| 摘要 |
By using a lubricating-oil composition that has a kinetic viscosity at 100°C of more than 9.3 mm2/s but no more than 12.5 mm2/s, has a high-temperature high-shear viscosity at 150°C of at least 2.9 mPa∙s, and contains (1) a base oil containing a base oil (A) that has a kinetic viscosity at 100°C between 2 and 7 mm2/s, inclusive, and a viscosity index of at most 120, (2) at least one species selected from among acrylate polymers and olefin polymers having mass-average molecular weights of at most 40,000, and (3) a lubricating-oil additive containing a sulfur-based extreme-pressure agent, a lubricating-oil composition that exhibits both reduced viscosity, improving fuel economy, and fatigue resistance, improving fatigue life, and also excels in terms of low-temperature viscosity characteristics can be provided. |
