I now have a V8 Discovery 2 on LPG. At 69.9 p a litre .Practically the maitince is no diffrent to a straight petrol. Performance is such that the only way I know I'm on gas is by the dash light. Fuel Consumption , I haven't really been able to work it out. Problems, NGK LPG plugs , at £18 each! Fortuntley will run on the normal ones. Finding some where to fuel is the pain. The reason I bought mine is it was cheap and I have a local LPG station. There seems to be no difinitive info on where you can get Autogas in UK. Problem with Disiel is that the LPG runs 30% of the power all the time. Loose LPG loose power, that's what the experts tell me.