Lubricating oil compositions

Details Lubricating oil compositions Lubricating oil compositions

C - Chemistry, Metallurgy

10

M

C10M 143/00 (2006.01)

Patent

CA 2606374

Lubricating oil compositions and viscosity index (VI) improver concentrates containing combinations of first polymers that are amorphous ethylene .alpha.- olefin copolymers; and second polymers that are star polymers, the arms of which are derived from diene, and optionally vinyl aromatic hydrocarbon monomer, wherein the star polymers have a Shear Stability Index (SSI) of from about 1% to about 35% (30 cycle).

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