| 摘要 |
<p>A lubricating oil composition for an internal combustion engine, which has excellent frictional properties and abrasion resistance and comprises a lube base oil and (a) 0.075 to 2 % by weight of at least one compound selected from the group consisting of molybdenum dithiocarbamate and molybdenum dithiophosphate, (b) 0.05 to 1.5 % by weight of a fatty acid ester and/or 0.05 to 0.5 % by weight of an organic amide compound, and (c) 0.1 to 3 % by weight of at least one organotin compound selected from the group consisting of zinc dithiophosphate and zinc dithiocarbamate: and another lubricating oil composition for an internal combustion engine, which has more improved frictional properties and abrasion resistance and comprises a lube base oil and the above components (a), (b), and (c) and additional additives, i.e., (d) 0.1 to 10 % by weight of at least one compound selected from the group consisting of calcium sulfonate, magnesium sulfonate, calcium phenate, magnesium phenate, calcium salicylate, and magnesium salicylate, and (e) 0.5 to 15 % by weight of at least one compound selected from the group consisting of benzylamine, boron derivatives of benzylamine, polyalkenylsuccinimide, and boron derivatives of polyalkenylsuccinimide. This composition is suitable particularly as a lubricating oil composition for an internal combustion engine having a low fuel consumption by virtue of the low frictional properties.</p> |
