Biodiesel in simple words is an advanced form of Biofuel. It refers to an animal or vegetable fat based renewable fuel, made up of a long chain of chemical compounds like propyl, ethyl, methyl etc. Created by chemically treating vegetable oil or animal fat with alcohol generating compounds, biodiesel is the revolution that is helping several countries overcome their dependence on diesel. It can be operated in any diesel engine with little or no modification to the engine or the fuel system.

In other words, biodiesel is domestically produced, clean burning fuel that can be produced from waste vegetable oils, animal fats, or recycled restaurant grease for use in diesel vehicles. It is biodegradable, less toxic and produce less pollutants when burnt completely. It can be used in pure form (B100) or blended with petroleum diesel. Most of the common blend include B2 (20% biodiesel, 80% petrodiesel), B5 (5% biodiesel, 95% petrodiesel) or B20 (20% biodiesel, 80% petrodiesel).