Following JF of Eastbourne’s email about the Honda Jazz, I bought a second hand CVT recently and have managed to push the mpg up to 51.5 average. I previously ran a Mitsubishi Colt DI-D auto that did 50 mpg on diesel. Now I have a better mpg and less cost because the Jazz is petrol. The autobox is seamless when changing, no lurching. Moves quickly if I need it but purrs along at 60-65mph on motorways. All in all a brilliant car in many ways.