Not before time
Absolutely not before time - much of this work has already been done in Europe and Japan/Korea, where they are street's ahead.
For most normal road cars a 2 litre 4 cylinder petrol engine is more than sufficient, and for SUV's 3L V6 petrol/turbo-diesel is also as much as you will almost ever need.
- Energy independence
- Oil conserved for the long term, inc chemical feedstocks
- Cuts costs of running automobiles