The non-renewability, ecological issues and health threats connected with the fossil fuels has resulted in exploration of alternative sources of energy to replace the conventional ones. An appealing innovation, still in its infancy, that could show us the method to the future ahead is Biodiesels. Biodiesels are diesel fuels stemmed from grease or animal-fat that could be utilized to run diesel engines. Vegetables oils like sunflower, rape seed, palm oil, soya bean, Jatropha etc can be subjected to oil processing to produce biodiesels. It includes no petroleum but can be blended with petroleum diesel for use or could be used in its pure type.