| 摘要 |
<p>The lubricating oil composition of the invention comprises a lubricating base oil with a kinematic viscosity at 100°C of 1-20 mm 2 /s, and a viscosity index improver having a ratio M1/M2 of 0.20 or greater, between the total area of the peaks between chemical shifts of 36-38 ppm M1 and the total area of the peaks between chemical shifts of 64-66 ppm M2, with respect to the total area of all of the peaks, in the spectrum obtained by 13 C-NMR. The lubricating oil composition of the invention has excellent effects, with a sufficiently high HTHS viscosity at 150°C, and a sufficiently low kinematic viscosity at 40°C, a sufficiently low kinematic viscosity at 100°C and a sufficiently low HTHS viscosity at 100°C.</p> |
