jakiefnh 
2006 Toyota Prius Hatchback 4dr Hatchback (1.5L 4cyl gas/electric hybrid CVT)
Toyota, go to the next step
 There is no reason why this car cannot achieve 100+ mpg. Both the batteries and electric motors are underpowered. I would prefer that this be a plug-in electric car with a high-end on-board electric generator. That said, I achieve 40-45 mpg in the winter and 50- 55 mpg in the summer. I do not understand why the electric motor cannot power the car from a dead start without the gas-powered engine having to kick in.