LUBRICATING OIL COMPOSITIONS FORMULATED WITH BLENDED VISCOSITY INDEX IMPROVER COMPOSITION

摘要

A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene .alpha.-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.