Abstract: An antioxidant bound VII polymethacrylate lubricant additive composition prepared by:(a) combining an antioxidant monomer (C.sub.1 -C.sub.20) alkyl monomers in an oil solvent to provide an intermediate reaction mixture;(b) stirring and purging the reaction mixture by nitrogen ebullotion for about 25-35 minutes at about 200 ml/min;(c) reducing nitrogen ebullotion to 15-25 ml/min and heating the purged mixture to about 70.degree.-85.degree. C.;(d) adding both a mercaptan and a radical polymerization catalyst to the heated mixture and then after about 2.0 hours adding an additional amount of the catalyst to said heated mixture, and then heating said heated mixture for an additional 2.0 hours;(e) increasing the temperature of the heated mixture to about 95.degree.-105.degree. C. and maintaining the mixture at such temperature for a sufficient period of time to remove any excess of the polymerization catalyst; and(f) recovering the product polymethacrylate.