Renewable Bio-fuels have emerged as attractive alternatives to the finite fossil fuels and their spiraling prices. Based on reduced emission pollutants, higher safety and better combustion, Bio-Diesel from tree borne oils (like Jatropha and Pongamia) is superior over crude derived diesel and this has lead to acceptance of blending of Bio-Diesel in conventional diesel, world over. Bio-Diesel blended diesel has already been found suitable for Railways, heavy and small vehicles, engines and generators.