Fossil fuels are available in limited quantity and may extinct in future. Moreover, pollutant emission from diesel engines affects the ecological systems. Biodiesel, derived from vegetable oil, is a renewable and green source of fuel. In this study, biodiesel produced from base catalyzed transesterification was blended with different diesel volumes. The diesel-biodiesel blends showed varied flash point (168-42 degrees C), viscosity (4.34-3.31 mm(2)/s), density (0.872-0.8351 g/cm(3)), acid value (0.3-0.4 mg KOH/g), and cetane number (51.6-49.5). The results showed that alcohol addition helped in reducing viscosity and density of biodiesel by almost half. These provide explanation on engine performance, combustion, and emission characteristics.