As an alternative fuel biodiesel is becoming increasingly important due to diminishing petroleum reserves and adverse environmental consequences of exhaust gases from petroleum-fuelled engines. Biodiesel, the non-toxic fuel, is mono alkyl esters of long chain fatty acids derived from renewable feedstock like vegetable oils, animal fats and residual oils. Choice of feeds tock’s  depends  on proces s  chemis try, phys ical and chemical characteristics of virgin or used oils and economy of the process. Extensive research informat ion is available on transesterification, the production technology and process optimizat ion for various biomaterials. Consistent supply of feedstocks is being faced as a major challenge by the biodiesel production industry. This paper reviews physico-chemical propert ies  of the plant and anima l res ources  that are being us ed as  feeds tock’s for biodiesel production. Efforts have also been made to review the potential resources that can be transformed into biodiesel successfully for meeting the ever increasing demand of biodiesel production.  In some seed like Pongumia and Watermelon Seed Oil prepared and blended with together to produce the biodiesel and to check the performance of the biodiesel. The study also includes examination of physical and chemical properties such as pH value, viscosity, density, flash point, fire point and acid values on the produ ced biodiesel as well as on the conventional diesel for comparison. The study revealed that the properties of the bio -diesel are very close to the conventional diesel.  

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