Got my Vy supercharged Calais converted today with Sprint gas sequential injection LPG
An excellent installation job,very neat and tidy under the bonnet, i can't tell the difference between power levels on LPG or petrol.

He tells me that it automatically starts on petrol then switches to gas once the engine temp reaches 45 degrees, also automatically switches to petrol if i run out of gas,all in all a very clever system.
I will let you know how the economy goes further down the track.