It is worldwide burning problem to find out best alternatives of fuel oil & to make sustainable energy future. The current study made in the year 2004, predicts that if the oil is consumed at the current rates, then by 2020, we will be consuming 80% of the entire available resource. This necessitates the search for alternative of oil as energy source or preserving it by tapping some other alternatives such as non-conventional energy sources, battery operated vehicles, photocells etc. and to convert their output into mechanical energy, which may alternatively preserve oil source.