LUBRICATING COMPOSITION FOR TWO-CYCLE INTERNAL COMBUSTION ENGINES

摘要

A solvent-free lubricant composition having improved lubricity properties for use in two-cycle internal combustion engines which comprises: (a) a major amount of a lubricant oil basestock, said baseSTOCK having a kinematic viscosity of about 1.5 to about 3.0 cSt at 100.degree.C; (b) from about 3 to about 15 wt.%, based on lubricant composition of a bright stock having a kinematic viscosity of about 20 to 40 cSt at 100.degree.C; (c) from about 3 to about 15 wt.%, based on lubricant composition of a polyisobutylene having a number average molecular weight of from about 400 to about 1050; and (d) from about 3 to about 15 wt.% of a polyisobutylene having a number average molecular weight of from about 1150 to about 1650; wherein said lubricant is characterized by having a minimum kinematic viscosity of about 4 cSt at 100.degree.C, a maximum kinematic viscosity of about 12 cSt at 100.degree.C and a flash point greater than about 100.degree.C.