METHOD OF IMPROVING VEHICLE TRANSMISSION OPERATION THROUGH USE OF SPECIFIC LUBRICANT COMPOSITIONS

摘要

A vehicle transmission incorporating a wet clutch, said clutch being lubricated by a transmission fluid containing a major amount of a lubricating oil and a minor amount of an additive composition including:
(i) a compound of structure (I):
wherein a is an integer from 1 to 10 and R is a hydrocarbon group made by the metallocene-catalysed polymerisation of an alphaolefin feedstock, said feedstock being 1-octene, 1-decene, 1-dodecene or any mixture thereof;
(ii) a friction modifier; and
(iii) an oil-soluble phosphorus compound.