to find alternatives to all products that are obtained from pet- roleum including diesel fuel. Biodiesel fuel, an environmentally friendly product, is considered the most promising fuel substi- tute for diesel fuel obtained from petroleum. It has so many advantages over regular diesel fuel. It is free of sulfur as well as cyclic hydrocarbons which will be reflected positively on the composition of the combustion exhaust and hence on the environment as well as the engine components by reducing the rate of their corrosion. In addition biodiesel is non toxic, biodegradable, has high lubricity and is obtained from