Study on Effects of Additives on Viscosity Index of Lubricating Oil

1,2,3 Department of Chemical Engineering 4 Department of Chemistry 1,2 R. V. College of Engineering, Bangalore-560059 3 Siddaganga Institute of Technology, Tumkur572103 4 DayanandaSagar College of Engineering, Bangalore-560078 Abstract— In this paper the effect of additives on kinematic viscosity of lubricating oils (base oils) at two different temperatures 40◦ C and 100◦ C were investigated. Triphenylphosphate (TPP) and 5 Benzly 1H tetrazole (BTZ) were used as additives. Different lube oils were prepared by adding additives in required concentrations to base oil. These oils were tested for viscosity at both the temperatures and viscosity index was calculated for all the oils. It was observed that viscosity decreased with the increase in additive concentrations and viscosity index increased with increase in additive concentrations.