The present invention relates to a graft polymer of: (a) a polyalphaolefm having a weight average molecular weight of less than 15000 and a polydispersity of 1,1 to 10; (b) a nitrogenous, ethylenically unsaturated, aliphatic or aromatic, graftable monomer having from 2 to about 50 carbon atoms; and (c) an organo-metallic compound selected from organo-molybdenum, organo-titanium, organo-manganese compounds and mixtures thereof; a process for making the graft polymer; and to a lubricating oil composition comprising a major amount of a base oil and a minor amount of the graft polymer.