FUEL ECONOMY ENGINE OIL COMPOSITION

摘要

The present invention is directed to a lubricating oil additive containing a vicinal diol and a particular detergent blend typically is 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.

主权项

1. A lubricating oil composition comprising:
a. a major amount of base oil of lubricating viscosity; b. a friction modifier which is selected from the group consisting of C10-C30 alkane 1,2-diols and C10-C30 alkene 1,2-diols; c. an overbased alkyl alkaline earth metal hydroxybenzoate detergent having a metal ratio less than 3.0; and d. an overbased alkyl calcium sulfonate or an overbased alkyl calcium hydroxybenzoate having a metal ratio of 3.5 or greater.