| abstract |
A hydrogenated copolymer produced by copolymerization of from about 1 to about 10 mol percent butadiene and at least one other C 5 to C 12 conjugated diene, and, if desired, in order to provide a block copolymer, up to 45 mole percent of a vinyl aromatic monomer, upon addition to lubricating oils containing a pour point depressing amount of an oil-soluble polymeric pour depressant, provides viscosity modification, oxidative and shear stability with excellent low temperature viscometric properties. |