| 摘要 |
<p>An internal combustion engine oil composition exhibiting detergent action over a long period and being excellent in fuel consumption performance, which comprises (A) a base oil consisting of a mineral and/or synthetic oil having a kinematic viscosity of 2 to 8 mm2/s at 100 °C and a total aromatic content of 15 % by mass or below, (B) 2 to 15 % by mass of polybutenyl- succinimide having a weight-average molecular weight of 6500 or above and/or a derivative thereof, (C) 0.2 to 5 % by mass of a phenol- and/or amine-type ashless antioxidant, (D) 0.2 to 15 % by mass of a viscosity index improver having a weight-average molecular weight of 400000 or above, and (E) 0.05 to 3 % by mass of a friction modifier, the percentages specified for the components (B) to (E) being based on the whole of the composition.</p> |
