Due of the predicted diminution of the fossil fuels in the near future, it has become a challenge for human beings to survive.  Serious attempts have been made to find out new and sustainable energy resources. Biodiesel, an alternative to diesel fuel, is produced by the transesterification of vegetal oil is suitable to use in diesel based engines without their modifications.

 In this research biodiesel is produced whose density is similar to that of the gasoline as ethanol is used instead of methanol. Series of experiments were conducted using blends of the prepared biodiesel and the pure diesel oil. The performance characteristics of the Perkins Engine were analyzed at 1500 rpm where load was increased gradually from 50 to 100%.  A result specific fuel consumption of biodiesel has decreased by 7.0% as compared to the conventional diesel fuel.  It was also investigated that the brake thermal efficiency of the engine is increased by 6.0% when ordinary diesel is replaced with the mixture of biodiesel and diesel.