Vegetable oils are green promising alternative fuels for diesel engines such as jatropha oil. When they are used in diesel engines, higher viscosity and lower volatility of vegetable oils causes problems in spray penetration, atomization and mixture formation. Blends of biodiesel and diesel oil by volume (B5, B20, B40, B70 and B100) are burned. We produced biodiesel with standard chemical and physical properties. A new biodiesel engine should be designed to burn biodiesel blends up to B100 according to biodiesel thermodynamic cycle is needed. Conventional diesel engines are not suitable to...