Recently, polymer nanocomposites have attracted greater interest as lubricant additives compared to pure polymer. In this work, we synthesized ZnO nanoparticles and characterized them using scanning electron microscope(SEM) and X-ray diffraction (XRD) analysis. The synthesized nanoparticles were then incorporated into the poly dodecylacylate to prepare polymer nanocomposites (PNCs) by sonication. The PNC was characterized using different analytical techniques like FT-IR, NMR, TGA etc. The additive performance of the PNC as viscosity index improver, pour point depressant and anti-wear were evaluated using the standard ASTM methods. The results demonstrated that, the overall performance of the additive was improved byincreasing the concentration of PNC in the base stock. It was observed that PNCs have shown good viscosity modifier characteristics as one of the composite having higher nanoparticles content shown viscosity index value of 137, which is higher than neat polymer. Moreover, up to 28% decrease in wear reduction was observed by applying the PNC.