Jatropha and Castor oils were obtained and transformed into their corresponding biodiesels by catalytic cracking using heterogeneous catalysts (Alumina and Montmorillonite-HCl) with different ratios (0.2%, 0.4%, 0.6%, 0.8% & 1%). The specifications of the obtained products were comparable to American Society for Testing and Materials (ASTM) specifications. The specifications of the obtained biodiesel were comparable to fuel properties of petroleum diesel. The suitable blend between the obtained biodiesel and fuel was described.
