Patent ID: 6586374
Filing Date: 2003-07-01
Classification: C10M,C10N

Abstract:
An engine lubricant comprising from about 55 to about 75 volume percent polyalphaolefin having a viscosity between about 6 and 8 centistokes at 100Â° C.; from about 5 to about 10 volume percent of a compound that is compatible with the polyalphaolefin and is selected from esters and diesters having a viscosity of at least about 3.5 cs at 100Â° C.; a sufficient amount of an ethylene-propylene copolymer having a shear stability index of at least about 25 to produce a resultant lubricant viscosity ranging from about 14.5 to about 16.5 cs at 100Â° C.; and sufficient total base number enhancer to raise the total base number of the resultant lubricant to at least 10.