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Rising scarcity of conventional fuels has forced the development of bio-origin alternative fuels for the existing power generating machinery. These new alternative fuels need to be investigated for their long-term effect on the engine hardware. The biodiesel developed from vegetable oil has been used to partially replace the conventional mineral diesel fuel for diesel engine application. Experimental condition monitoring Study indicated lower wear of vital parts for the biodiesel blend fuelled engine pointing towards inherent lubricity properties of the biodiesel fuel. This phenomenon was experimentally verified in the present investigations. Series of experiments were conducted on SRV optimol wear tester by sliding a pin made of piston material against a disc made of cylinder liner and the lubrication was provided by the selected fuel blends.