The present invention is directed to a lubricating oil additive containing a vicinal diol and a particular detergent blend; typically mixed into low viscosity base oils whereby exhibiting improved fuel economy. In this respect, disclosed is a lubricating oil composition comprising: a major amount of base oil of lubricating viscosity; a friction modifier which is selected from the group consisting of C10-C30 alkane 1,2-diols and C10-C30 alkene 1,2-diols; an overbased alkyl alkaline earth metal hydroxybenzoate detergent having a metal ratio less than 3.0; and an overbased alkyl calcium sulfonate or an overbased alkyl calcium hydroxybenzoate having a metal ratio of 3.5 or greater.
                            本发明涉及一种润滑油添加剂,它含有一种沧基二醇和一种特殊的混合清洁剂;通常混入低粘度基础油中,从而提高燃油经济性。在这方面,本发明公开了一种润滑油组合物,该组合物包括:具有润滑粘度的大量基础油;选自 C10-C30 烷醇 1,2-diols 和 C10-C30 烯醇 1,2-diols 所组成的组的摩擦改进剂;
金属比小于 3.0 的过基烷基碱土
金属羟基
苯甲酸酯洗涤剂;以及
金属比为 3.5 或更大的过基烷基
磺酸钙或过基烷基羟基
苯甲酸钙。