LUBRICATING OIL COMPOSITION

摘要

As a lubricating oil composition for an internal combustion engine that improves fuel efficiency and has the primary objective of driving a generator, provided is a lubricating oil composition characterized by: (A) a base oil being a hydrocarbon base oil of which the ratio (CA/CB) of the proportion (CA) of the component having a carbon number of no greater than 24 of the carbon number distribution obtained by gas chromatography distillation to the proportion (CB) of the component having a carbon number of at least 25 being at least 2.0; the ratio (Vs/Vk) of the high-temperature high-shear (HTHS) viscosity (Vk) of the lubricating oil composition at 80°C and the HTHS viscosity (Vs) at 150°C being at least 0.4; and the kinematic viscosity at 100°C being 5.2-8 mm2/s inclusive.