abstract |
(57) SUMMARY The present invention relates to (a) a major amount of a lubricating oil; (b) an oil-soluble phosphorus compound; (c) an ashless dispersant; and (d) a structural formula I: R-NH 2 , R is an alkyl having from about C 8 to C 30 (ie, an alkyl primary amine). As an optional ingredient, the power transmission oil composition of the present invention may also include an amine-containing friction modifier. |