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Lexus LS400 - LPG blog - Maroon400
I thought it might be useful to write a blog of my experience of LPG conversion from start to finish.
Today I will be dropping off my 1999 Lexus mk4 LS400 to Battersea Autogas to have a BRC system with auto flash lube fitted. I have requested they remove the inlet manifold when drilling to prevent swarf entering the engine.
They have complied with my request without reservation, when I drop off the car I will also insist on photos being taken of the engine with the manifold off for confirmation.
My experience with Marco at Battersea Autogas so far has been excellent, so let's see how it goes!
Lexus LS400 - LPG blog - craig-pd130

Interesting, please do keep us posted.

Just one point (and it's a genuine question, I'm not being sarcastic): I wonder how many LPG installations are done without removing the inlet manifold (or wherever the drilling is made to install the LPG injector), thus risking either plastic or metal swarf in the inlet tract?

Lexus LS400 - LPG blog - gordonbennet

Plastic inlet manifold on my MB, i doubt that was removed for drilling but then whenever i've drilled plastic all but the tiniest specks work up the drill bit, those few bits i wouldn't concern meself about.

Indeed 3 years after the CHG started weeping on my car, my indy who did the job noted that the head which i had asked him to pay special attention to was in his words perfect...he hates the fact i had the conversion done as he is a MB purist so i think he was hoping to find some signs of VSR or other nasties to beat me metaphorically with.

Lexus quite a common car for the conversion, so yes i too will be watching this with interest...mainly as i see the new shape 460's are coming down in price, would make a nice LPG'd luxobarge..assuming they arn't direct injection..

Edited by gordonbennet on 07/10/2013 at 12:28

Lexus LS400 - LPG blog - bathtub tom

Is it worth having a fourteen-year-old car converted?

I would've thought you'd have to do an awful lot of miles in a short time to recoup the cost, added to which you'll be doing them in an old car that must be prone to expensive repairs.

Lexus LS400 - LPG blog - craig-pd130

Is it worth having a fourteen-year-old car converted?

I would've thought you'd have to do an awful lot of miles in a short time to recoup the cost, added to which you'll be doing them in an old car that must be prone to expensive repairs.

This is why I'm looking forward to updates. If LPG is approx. 60p a litre cheaper than petrol, my ciggie-packet maths reckons it'll take around 2,750 litres to recoup a £1,500 conversion cost (as the car will still use some petrol).

In a relatively thirsty car like the Lexus, that could be within 12,000 miles ...

Lexus LS400 - LPG blog - Collos25

It may be at the moment 60p per litre cheaper but you will get nowhere the mpg with gas as you would with petrol.The maths will never stack up trying to convert a 14 year old car the conversion will cost probabley double what the car is worth and thats on the conservative side

Lexus LS400 - LPG blog - RT

LPG consumption is generally accepted to be 20% worse so the breakeven is longer.

Lexus LS400 - LPG blog - Maroon400
Try doing the maths on owning even a 3year car let alone the depreciation on a new car with a high revving turbo diesel engine with fashionably high MPG,
It's just another way to keep us all in debt I recon ?? remember when diesel was cheap? Then we all got into diesels now it costs more than petrol, then there was the Prius.......the carbon footprint of that baby!!!!! Stop me please ??
Try asking what someone paid for their house, I bet they won't say what it really cost i.e. Including the interest. We are all deluded! I think I'm ranting ?? sorry
Lexus LS400 - LPG blog - Maroon400

Is it worth having a fourteen-year-old car converted?

I would've thought you'd have to do an awful lot of miles in a short time to recoup the cost, added to which you'll be doing them in an old car that must be prone to expensive repairs.

Ah yes, conventional wisdom would suggest that you are correct. However The logic behind my decision is as follows. 1. Internet search : the most reliable car produced in the last 20years? From warranty data Lexus LS400 mk4 2. Cost to purchase said item, 1 owner, 85k genuine miles, full service history, All major work carried out, ie cambelt, suspension (know issue from warranty data) £2000 I think this car was around 40k new 3. On petrol this car does 28mpg urban cycle, this translates to around 22mpg on gas, this is a conservative estimate considering the info received from owners that have converted to LPG on the Lexus forum 4. Road tax is at lower rate as it is pre march 2005 5. The car has every extra you could want, touchscreen satnav, heated seated leather seats, cruise, electric heated mirrors, a/c the list goes on, and all working. 6. Did I mention that LPG at Morrison's supermarket is 66p ltr I think that translates to to upper 48ish to the gallon. About the same as I get out of my other car an Audi A6 1.9 diesel with 80k miles That I paid nearly 7k for 2years ago and is probably only worth half that in private sale today if I'm lucky! So all in all, not conventional and it may not suit everyone, but I'm having a great time finding out for the cost of an average holiday. 4ltr V8 Why not?
Lexus LS400 - LPG blog - Maroon400
I may well head towards a 430 if this works out, the only trouble is, there is so much to go wrong on the later cars. It seems that by the time they sorted out the niggles with the new shape it was after 2006 and the road tax bracket soured! Anyway let's see how it goes, my total outlay is around £3500 with this one,
It's kind of holiday money so no hope or fear ??
Lexus LS400 - LPG blog - Maroon400
To be honest, I don't don't think most people think about it.
I think I might be a little nerdy, hey Ho ??
Lexus LS400 - LPG blog - Maroon400
LPG blog Update.
Dropped the car off today, went through where the LED indicators for gas and lube will be placed also where the filler
Will go. Decided to to have it in the body rather than in bumper as I have a dodgy back and don't want to make it any more difficult than it needs to be. There seems to be some concern about the security code for the audio/satnav system, I did not get a code with the car paper work, found a thread with some instructions for resetting on this forum, also it might be that it is disabled, I have taken photos of the relevant pages from the book supplied with the car and sent them over via email, there is a number written by hand in the book but it looks like a mobile number, I believe the code has 4 digits? if anyone can shed light on this I would be grateful.
There was one thing I found a little surprising. It seems they didn't have the correct software to hand to read the on board computer,
Apparently it is at the other branch???? (Is there one) And will be there tomorrow. Again let's see
Lexus LS400 - LPG blog - tanvir
LPG blog Update. Dropped the car off today, went through where the LED indicators for gas and lube will be placed also where the filler Will go. Decided to to have it in the body rather than in bumper as I have a dodgy back and don't want to make it any more difficult than it needs to be. There seems to be some concern about the security code for the audio/satnav system, I did not get a code with the car paper work, found a thread with some instructions for resetting on this forum, also it might be that it is disabled, I have taken photos of the relevant pages from the book supplied with the car and sent them over via email, there is a number written by hand in the book but it looks like a mobile number, I believe the code has 4 digits? if anyone can shed light on this I would be grateful. There was one thing I found a little surprising. It seems they didn't have the correct software to hand to read the on board computer, Apparently it is at the other branch???? (Is there one) And will be there tomorrow. Again let's see

If it's an 11 digit number the second digit is a 7, it's a mobile number.

Lexus LS400 - LPG blog - Maroon400

Blog Undate 3

Security code, as I did not have the code for my car and Autogas Battersea needed to disconnect the battery to do the conversion

I needed a solution. To my amazement I found the info on the Lexus owners forum and sent it over to AB by email.

hey presto!!! it worked.

True to there word Autogas Battersea sent over pics of the removed inlet manifold yesterday for my peace of mind (thanx Marco)

interesting though before they started they hooked the car up to a laptop just to check and found a slight misfire.

the strange thing is the car has been driving perfectly and neither I nor anyone at Autogas Battersea could detect such a thing.

anyway I had already asked for new platinum plugs to be fitted so hopefully that should sort it out.

will post pics when the job is finished.

Lexus LS400 - LPG blog - Ethan Edwards

NO!!!!

LPG eats Platinum. Ask for Irridium.

http://www.globaldenso.com/en/products/aftermarket/plug/plus/features.html

Quote

Also, because taxis use liquefied petroleum gas (LPG) as fuel, a large electrode increases the required voltage, and because this places a larger load on high tension cords and coils, it affects the life of the vehicle. With its 0.4mm center electrode that keeps the required voltage low, it can be said that the IRIDIUM PLUS, is a car-friendly spark plug.

Unquote

These plugs are designed for LPG.

Edited by Ethan Edwards on 10/10/2013 at 14:17

Lexus LS400 - LPG blog - Maroon400
Thank you Ethan, I just checked. They are using NGK Iridium plugs.
That was my error not Autogas Battersea.
But thanks again for the education. ??
Lexus LS400 - LPG blog - gordonbennet

Thanks for the update, early days yet, agree about having the filler at a reasonable height, you want it just over knee height in order to be able to exert some force on the thing using your knee as a lever, useful to be able lever the filler off with your foot to release the pressure after filling too, saves that blast of propane onto your hands, i wouldn't want one mounted under the rear bumber as some 4x4s do.

For the doom merchants who can't undertand the economincs i'll try and explain something.

LPG converting an older car you enjoy isn't purely about payback time, though cost does have some impact but not quite in the mercenary terms that most people think.

My own car i want to last for many years, i love it but not as weekend toy its my daily driver, converting to LPG gave it the economy and the freedom that brings to drive it as far and as fast as i like, it was simply too expensive to run on petrol @ anything from 17 to 25 mpg depending on my right foot as a daily commute vehicle.

My car is now 17 years old, it was converted just over 3 years ago, it should with a bit of luck last another 10 years in my care (assuming i last too) before major full strip out is needed.

Don't forget the depreciation factor, M400's car and my MB are paid for, mine cost me £9k over 10 years ago, its worth around half that now in its present excellent and increasingly rare condition, hopefully in another 10 years it will start to creep back up in value...mind you theres no profit involved for it costs more to keep these cars in tip top condition to make them last than i'll ever see back, but thats not the point if you really enjoy your car.

Those of you who put it simply in payback terms forget that we don't all like new cars, in fact some of us, me, hate the cloned electronic computerised latest garbage with a vengeance, i wouldn't give you a thankyou for a blue eco tec tractor engined whatever with a twin clutch automanual gearbox, climate control and an electric parking brake, ugh perish the thought..

You wouldn't think twice about replacing your modern car with another new(ish) one, another modern electronic thing with eye watering depreciation often with the excuse that it does 10mpg more and has more toys (to go wrong)....it might cost you £10k to change, it cost me £1750 to convert my MB to give me approx 22mpg average @66ppl at present prices, and my car isn't depreciating.

You like your modern cars, i like my old faithful pair of motorised slippers.

edit, every time i full the tank for around £35 it gives a warm feeling of contentment.

Edited by gordonbennet on 08/10/2013 at 00:49

Lexus LS400 - LPG blog - brum

As a point of interest, in Poland, where LPG is widely available at many garages, manufacturers offer LPG versions of their cars.

e.g. skoda

br.skoda-auto.pl/microsites/skoda-z-lpg/

Lexus LS400 - LPG blog - pd

I have a LPG LS400 myself knocking around. They certainly convert well although I don't think you need the Flashlube.

They do about 22-24mpg on LPG on a run and about 16-18 around town. They won't do much more.

They are worth converting if you have a nice one. They are one of the best cars ever built and better built than the later 430 & 460.

As to value I'd take issue with LPG converted cars not being worth more than non, large engined ones in particular so you do get some of your money back. For example I had a large V8 car in last month which in regular format was worth £1200-£1500. Bunged it on ebay and hot £2800 for it with a *lot* of interest.

Prices of decent Mk IV LS400's are, if anything, firming up if they're sensible mileage and have excellent s/history so the OP is unlikely to lose much on it.

Lexus LS400 - LPG blog - Maroon400
LPG Blog update
I was meant pick up my car on Friday eve but had forgotten (much to my wife's disgust) that I had to attend an event early on Friday eve out in Kent, with a stay for a long weekend. It would have put pressure on BAttersea Autogas to finish ahead of the scheduled time so I'll pick up early next week. I am becoming very aware of the time impact on the installer when removing the inlet manifold.
I can really see why they avoid it in order to remain competitive.
The link below is to a thread I started on the LPG forum inviting installers
To comment on the subject that you might find interesting.
there has been a good response.

www.lpgforum....hp?f=33&t=12737