Comparative Study of Used and Unused Engine Oil (Perodua Genuine and Castrol Magnatec Oil) based on Property Analysis basis

The purpose of this study is to investigate and compare the viscosity index (VI) and wear elements of two different engine oil brands. The two engine oil brands used were Perodua Genuine (PG) Oil SAE5W-30 and Castrol Magnatec (CM) oil SAE5W-30. The value of VI is obtained by comparing the kinematic viscosity value of engine oil at 40 oC and 100 oC according to ASTM D2770. Wear elements analysis was performed by using optical emission spectrometer (Baird MOA Lube Analyst). All wear elements obtained such as Lead (Pb), Iron (Fe), Aluminum (Al), Silver (Ag), Tin (Sn) and Copper (Cu) were discussed. The result revealed that VI value for both PG and CM oil increased as compared to the unused oil and the Lead (Pb) element exhibited higher value of wear elements (in parts per million unit) especially in the CM oil.