This research article outlines the friction and wear behavior of madhuca indica oil (mahua oil) blended with 0.25-1% by weight of graphene nanoplatelets (GNPs) using four-ball tester in accordance with ASTM D-4172 standard. The micro-morphology and wear scar diameter of the rubbed steel ball surfaces were characterized by optical microscopy. The test results were compared with base mahua oil lubricant. The addition of GNPs in the base oil acted as a superior lubricant additive which reduced both the friction coefficient and wear loss in terms of wear scar diameter of steel balls. The loading of very small quantity of GNPs (0.25 wt. %) in mahua oil could be used as effective bio-based lubricant in automotive engines for better mechanical as well as thermal efficiency.
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