Now i know what your going to say 'Its a v8 if you want good mpg buy a TDI'. How ever i'm getting 7mpg round town and 11mpg on a run from my 1998 disco v8. It has Lpg convertion but does the same on gas/petrol so can't be owt to do with the lpg?.
It runs/drives fine no missfires or back fires ...