Just put this in nother post but might as well go here to as it is applicable.The life spans of engines seem to be a matter of great debate.Taxis do a millon k's on lpg would they do 2 millon on petrol?LPG burns higher, does it then keep down carbon deposits? which do the most damage?Or does it damage engine components that are suseptible to heat?This is an issue on which all have thoughts.Would be good to get some expert advice through them that know :doubt: Cheers peeps

A properly-tuned LPG system should burn cleaner than running on dodgy petrol.

The Ford 6s are pretty lazy & under-stressed, but Taxis don't go forever without
regular maintenance anyhow. Their engines get rebuilt every 300-400thou, usually
sooner when any of their idiot drivers don't realise they've blown a water hose
and keep driving until the engine cooks.

A properly-tuned LPG system should burn cleaner than running on dodgy petrol.

The Ford 6s are pretty lazy & under-stressed, but Taxis don't go forever without
regular maintenance anyhow. Their engines get rebuilt every 300-400thou, usually
sooner when any of their idiot drivers don't realise they've blown a water hose
and keep driving until the engine cooks.

LPG doesnt lube the bore like petrol does on cold starts. diesel does it even more hence why a 200,000 diesel is barely broken in. Treated well a petrol motor with 250,000 could still run great. but thats unlikely it although not visable it is burning oil. Rebuild every 150000km and you should get 500km without a rebore. rebuild every 300,000 and you need to rebore each time. thats what i reckon anyway. i rebuilt my motor at 92,000, but its under alot of stress to put out 100 odd kw from 993cc

LPG doesnt lube the bore like petrol does on cold starts. diesel does it even more hence why a 200,000 diesel is barely broken in. Treated well a petrol motor with 250,000 could still run great. but thats unlikely it although not visable it is burning oil. Rebuild every 150000km and you should get 500km without a rebore. rebuild every 300,000 and you need to rebore each time. thats what i reckon anyway. i rebuilt my motor at 92,000, but its under alot of stress to put out 100 odd kw from 993cc
Yep thats true but on all the new tuned lpg motors I mean the ones built for it and not the coversons they cold start with petrol anyway.Then when driving you don't have petrol washing away all the lubricating factors?this is what I have been told I don't know this to be a fact but :doubt:

On old-style engines where you've totally screwed up the carbie tuning :) yep you can
be running so rich that the fuel washes away all the lube in the cylinder and the
engine nearly seizes (score marks down the walls). Check the sump and you'll
find it overflowing... the petrol has diluted into the oil and doubled the volume. :shock:

on top of all the other points that everyones has raized,
I was taught that Long Haul trucks and taxis would get higher k's than average from an engine because the engines are always hot, they don't often get the chance to cool down and they do very little running when cold and wearing fast.
Most long haul fleet trucks even get serviced while there still hot. (they don't make money off the road)

on top of all the other points that everyones has raized,
I was taught that Long Haul trucks and taxis would get higher k's than average from an engine because the engines are always hot, they don't often get the chance to cool down and they do very little running when cold and wearing fast.
Most long haul fleet trucks even get serviced while there still hot. (they don't make money off the road)

hence why my 97 verada with 160,000k's is still running as good as new as all the k's are done on long trips and very few short trips stopping and starting

jaz

I got a 2001 tj dual fuel factory approved.runs like a dream after 185000 k's (ex Repco sales rep car)so engine has been built for dual fuel I guess.I am hopeing for 300,00k anything else a bonus.What do youse reacon?Nother small prob for youse peep's :confused: Car on LPG is going at bout 19l 100km highway driving 80%.I know lpg economy is not that flash but do I need the lpg tuned?

i don't know if that is normal for a magna 3.5L on lpg but I have had a few cars on lpg that i would run from full tank to loss of power (empty) on gas, then switch to petrol. 2 are.

a 3.9L EB wagon 3speed auto that would take 78L and do 520km a tank. Untill it lost compression from 3 months of constant high revs. 3speeds where a 4speed should be doesn't like to cruise on much more than 110kph :badgrin:

a 2.6L TR auto that takes 65L and will do 480km+ or 380km if I run it rich enough to match petrol for performance.

I live on top of the great divide (home is at 1300m above sea level)
I notice a big difference in milage on LPG between here and when i'm on the coast. More k's per tank on the coast.
Non turbo diesels at factory settings, will blow black smoke here when the same vehicle won't on the coast

on top of all the other points that everyones has raized,
I was taught that Long Haul trucks and taxis would get higher k's than average from an engine because the engines are always hot, they don't often get the chance to cool down and they do very little running when cold and wearing fast.

heh, it was my business know trucking industry.

Diesel engine in trucks are huge (8-15L)... they are designed to be understresed to have
an "easy" life. They got lots of torque so their revrange is about 500-1500rpm.
All components are built heavy-duty so there's lots of meat in the metal.

Truck engines usually run 300-400thou before they need some attention, usually take
the head off and check how's things going. 1M klicks might need a minor rebuild.
Lots of space in a truck to fix things, engines can have their top ends rebuilt in-situ
without taking the whole engine out.

Gearboxes might last up to 2M klicks if your driver isn't hamfisted. Crappy (hired!) drivers
will kill the box much quicker; but lately auto boxes are getting more popular for the
lighter-duty trucking so those can help box life.

Caring owners would do a service (oil & filter change) every 10thou, that's like
monthly for local trucks and fortnightly for interstaters. Check brakes, check tyres
and that's about it.

After about 4-5yrs and 2M klicks... could consider a "repower" new engine, say $35k.
Even a major overhaul would cost $25-30k, so a new engine with warranty sounds better.


Most long haul fleet trucks even get serviced while there still hot. (they don't make money off the road)
Nah, your myth comes from "aviation"... :confused:

Average Oz truck spends about 40-44wks/yr on the road.
The other 8-12wks its either parked in the workshop or the owner has taken off.

Do the sums...
Average 500hp Mack or Kenworth... price about A$300k to purchase a newie.
That'll cost you about $400 every calendar day - not cheap, but still 'affordable'
even if its parked for a week.

But even a "little" 737-800... that's like A$80M when fitted for commuter duty.
To lease one of those would cost about $30,000 per day every day!!
So planes don't get much sleep.

Car on LPG is going at bout 19l 100km highway driving 80%.I know lpg economy is not that flash but do I need the lpg tuned?
Usually they say LPG runs about 20-30% higher consumption.

19 / 1.30 = 14.6... so that's still a bit steep.

Not sure if I'd trust the computer display, do some manual calcs yourself at every fillup.

hence why my 97 verada with 160,000k's is still running as good as new as all the k's are done on long trips and very few short trips stopping and starting

jaz
Yep. Same as mine was worn out at 150,000, though it soldiered on for another 30k

so peeps what can we expect to get from our tj's 300,000 or 400,000 km's?Has any one any links to sites dealing with this subject eg mitsu test results etc they would be informative methinks :)

140000k TF 3L auto...perfect, never had a problem. NO nasty surprises or expensive repairs. Its awesome

I have an EA with 650,000 on it. Most are 120km highway trips each way. About a 1500k's a week. Change oil EVERY 5,000k's. It's had a new water pump, lots of batteries, a head shave after I blew the front end out of the head gasket and various suspension rubbers etc. It's not as quick as it used to be, but still pulls the 20ft boat with ease. When I turn it on, it never gets switched off untill the thermostat opens. And I've had my fair share of heavy right footedness (if there's such a word). If my TL lasts half as long I'll be one happy chappy. My TN was stuffed after 327,000k's. It got retired to the wreckers.