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In this study, Michelia Champaca was referred as the raw oil for considering tribological investigation. The oil contains major amount of unsaturated fatty acids that was reduced by performing epoxidation process. In the investigation, CeO₂ nanoparticles were utilized as an additives to the chemically modified oil. The lubricants were examined for the thermo physical properties like kinematic viscosity, viscosity index increment, and flash point, pour point and dispersion stability with tribological analysis. Tribological characterization was conducted by using pin-on disc machine. With chemical modification of oil, an increment in the viscosity was observed. The maximum increment with reference to the viscosity was observed with 1.2% nanoparticles concentration at 100 °C temperature. The flash point increases with the addition of the nanoparticles but decrement in the pour point was observed with an increase in …