Energy is indispensable and this fact is undeniable. This has unleashed a never ending quest for new Energy resources, however, conservation of energy and the improvement of efficiency of machines is equally important. Regenerative Braking is one such effort to conserve energy. Regenerative Braking has been of topic of much research, and thus is widely used in Automobile Industry. However this effort is usually directed towards electric vehicles only and is not very efficient. This study emphasises the importance of the elimination of the transformation of energy which is accompanied by various losses, thus eliminating losses. The primary focus is to store the Mechanical energy of a decelerating vehicle in its present state without any conversion. The approach includes devising a feasible method of conserving the Kinetic energy of moving vehicle using a series of Flat Spiral Spring of different materials and comparing their performance using simulation. Plot of Fuel consumption with Braking Frequency with and without Energy storage system is generated. The Feasibility improves with the cascading of the Flat Spiral Springs. Performance with different Materials for Spring are different. The Fuel Consumption shows a relative decline when the system is Used and the reduction improve with the frequency of application of Brakes.