Personally I think you have answered your own question in the first two lines of your post especially the bit, "....spare RR 4.6 HSE. That one has a knackerd engine!"
To go upsetting a perfectly happy 120k petrol engine I think would give you two of the above in quick time.
When you work out the proportions of cost against mpg there isn't much in it these days by going gas v petrol.
Opinion is probably 50/50 but personal experience of visiting the local breakers yard is that there are a lot of P38s lying around with a big spare tank in the boot - nearer 70/30%.
why do people blame lpg for engine trible that is caused by poor maintenance regimes. you are talking out of your arse!!!
lpg burns very well in petrol engines, IF it is set correctly and the rest of the system is in good order.
the v8 block is weak, it can and will go regerdless of fuel used. its the design thats crap! any trouble with the coolant side of things can trigger liner slip. read up on it!!!!
most lpg issues can be solved with a service and reset up of the lpg system. using a bit of research and a little common sense a petrol engine can run perfectly well and possibly better than it does on petrol!!
Here we go again...
Well mine's up to 122000 miles now, more than 60k of which have been on lpg and it's still going strong.
I reckon if yer engine's going to slip a liner or whatever iit'll do it regardless of the fuel you use in it.
Guy
i agree, mine went at 165k due to a bit of garden hose used instead of proper coolant hose!
Like Kooky Guy, mine has just passed 125k and has done more than half of this on LPG ( according to the service records etc...) Appart from the usual P38 electrical gremlins, mine is running just fine (TOUCH WOOD)
mines at nearly 180k. it was converted in 2000 (its a 96) and has covered about 100k on lpg. (it is on its second block tho it had done 165 when it went)
I'm a firm believer in leaving things as they are designed. My 4.6 runs on petrol, as did the previous 3.9 Classic Vogue and 3.5 Disco.
Why didn't Land Rover offer a LPG option during the build??
I'm all for cheaper running costs but if or when the day comes that I can't afford to run it on petrol....off she goes.
Just look at the number of posts on here referring to LPG problems !!!!
So my advice is..leave it as it was intended...on petrol.
i like you john but i'm afraid if things were left as designed we'd still be chasing animals with lumps of wood (mebbe they still do round your way?) i can't agree with your comment. the reason landrover didn't offer lpg is b'cos not many people with 50k to spend on a car care about the planet or the mpg!!!
My father is an old school engineer who has worked on cars and land rover for years. He did a lpg conversion for a local farmer on a 2 1/4 petrol Series back in the seventies. He serviced that Landy year in year out and at every oil change the oil came out as clean as it went in. I know its not a Rangie but what does that tell you?
exactly good routine maintenance!!!
I used to put £80 worth of petrol in before I went to gas. I now put in £40 of gas - do the math. It runs smoother, is quieter and the oil has been a lot cleaner.
A good front end sequential system is essential, I bet all those in the brakers are old style poorly adjusted mixer ring systems.
Mine cost £1400 fully certified and setup (DIY install)
Only if you have a a badly setup lean running system which will cook your engine. The modern systems run off the O2 sensors so mixture is always spot on.
the modern systems simply plug in at various point to ensure they work with the car's ecu to achieve an almost exact same environment to petrol!!!
also a lean running petrol engine can self destruct!!!
