Even today, high capital outlay, fire risk, and range anxiety mark out the electric car. The range extender car gets rid of the range anxiety, but apparently not the fire risk. The appearance of fracking, and the recent advances in Otto cycle spark ignition engine effieciency( viz the Ford Ecoboost) seems to herald the advent of a predominance within a handful of years of LPG or CNG powered vehicles for the next two or three decades.