An engine oil composition characterized by containing a major amount of lubricating base oil and (a) 0.01 to 30% by weight of an overbasic oil-soluble metal salt prepared by use of an alkaline-earth metal borate, (b) 0.01 to 5% by weight of a molybdenum dithiocarbamate, and (c) 0.01 to 5% by weight of an antioxidant as essential components, on the basis of the total amount of the composition.
一种发动机油组合物,其特征是含有主要量的润滑基础油和 (a) 0.01 至 30% (按重量计)通过使用碱土
金属
硼酸盐制备的过碱性油溶性
金属盐,(b) 0.01 至 5% (按重量计)二
硫代
氨基甲酸钼,以及 (c) 0.01 至 5% (按重量计)
抗氧化剂(以组合物总量为基础)作为基本成分。