Hi, I am David Lewis, I have a Black P38 4.0 ltr on LPG, a Discovery V8 special Vehicle on Lpg, a Discovery 300 Tdi at the moment. I have had 6 Range Rovers, One 90 and an Air Portable Lightweight in the past. My F reg Range Rover Vogue did 280,000 miles on the original engine. My P38 has...