| abstract |
A lubricant composition comprises a base oil and an additive composition comprising: a detergent, wherein the detergent is an overbased phenate detergent; and an additive, wherein the additive is zinc dialkyl dithiophosphate. The additive composition exhibits at least one. of reduced thin-film friction and increased fuel efficiency as compared to an additive composition that is devoid of the detergent and the additive. The lubricant composition can be used to lubricate an engine, a transmission or a gear set. |