| abstract |
The present invention provides a kind of lubricant oil composite, and it contains：Lube base oil, wherein it is 25mm that the urea adduction value containing the mass % of 10 mass %~100 on the basis of base oil total amount, which is dynamic viscosity below 4 mass % and at 40 DEG C, 2 / below s, the lube base oil component that viscosity index (VI) is more than 120；Poly- (methyl) acrylic ester viscosity index improving agent, wherein the ratio of the construction unit shown in following formulas (1) is 0.5~70 mole of %.Dynamic viscosity of the lubricant oil composite at 100 DEG C is 4~12mm 2 / s, viscosity index (VI) are 140~300.In formula (1), R 1 Represent hydrogen or methyl, R 2 Represent the straight-chain of carbon number more than 16 or the alkyl of branched. |