Disclosed are lubricating oil compositions comprising a lubricating base oil, (A) a specific alkali metal or alkaline earth metal salicylate and/or an overbased or basic salt thereof in an amount of 0.005 to 5 percent by mass in terms of metal, (B) a phosphorus-containing anti-wear agent in an amount of 0.005 to 0.2 percent by mass in terms of phosphorus, (C) an amide compound in an amount of 0.01 to 1 percent by mass and containing sulfur in a total amount of 0.3 percent by mass or less, based on the total mass of the composition. The lubricating oil compositions are low sulfur lubricating oils which are extremely excellent in anti-wear properties and long drain properties and suitable particularly for an internal combustion engine.
所公开的润滑油组合物包括润滑基础油、(A)特定碱
金属或碱土
金属
水杨酸盐和/或其过基或碱性盐,以
金属计,含量为 0.005 至 5%(质量百分比);(B)含
磷抗磨剂,以
磷计,含量为 0.005 至 0.2%(质量百分比);(C)酰胺化合物,含量为 0.01 至 1%(质量百分比),含
硫总量为 0.3%(质量百分比)或更多。(C) 以组合物总质量计,含
硫量为 0.3% 或更少(以质量计)的酰胺化合物,其用量为 0.01 至 1%(以质量计)。这种润滑油组合物是低
硫润滑油,具有极佳的抗磨损性能和长换油期性能,尤其适用于内燃机。