In this investigation, nine distinct vegetable oil-based blends were made from jatropha, sunflower, and soybean, by mixing them with commercial-grade engine oil of SAE20W40 and 1%, 2% weight percentage of Zno-Cu nanoparticles. Under the ASTM D4172B standard, four ball lubricant tests were used to examine the physiochemical characteristics: density, viscosity, viscosity index, and flash point as well as the tribological characteristics. A higher percentage (2%) of nanoparticle addition produced superior effects, according to the data. However, the pour point of the biobased lubricant is also decreased at nano-par- -ticles the pour point should be increased due to wax crystal formation as nanoparticles act as nucleating site. When compared to SAE20- -W40 commercial lubricant, the J102 and Su202 blends in particular have demonstrated decreased wear scar diameter (57.3% and 51.6%, respectively).