Can I use a different fuel with this system, eg compressed natural gas (CNG)?
Yes, CNG will work with this system in just the same way that the LPG does. CNG produces lower emissions, and similarly priced to LPG. It does require higher pressures to contain it in the tank however, so the tanks can be more expensive. Also, it requires a dedicated fuelling point, and therefore is not readily available at fuel garages nationally.
