LUBRICANT COMPOSITION CONTAINING MIXED FRICTION MODIFIERS

摘要

The present invention provides an improved lubricating oil composition for autom otive internal combustion engines and transmission which comprises an oil of lubricating viscosity having admixed ther ewith a minor amount of friction modifier composition which reduces the coefficient of friction between moving mechanical parts, thereby providing for enhanced fuel economy. The friction modifier composition comprises a combination of an alkoxyl ated hydrocarbyl amine and a polyol partial ester of a saturated or unsaturated fatty acid or mixture of such esters, each prefera bly present in the range of from about 0.1 to about 1.0 % by weight based on the weight of the oil. This combination of components p rovides for synergistic fuel economy effects particularly when used as components in automotive crankcase lubricants also con taining conventional additive packages, which effects are not observed in oil which contains one or the other of these compone nts alone.