Does the DPF get replaced or inspected/cleaned at service?

[SSbaby Member Find all posts View Profile Close SSbaby]

I've tried researching but I've read conflicting comments. Does the particulate filter get replaced with a newie at the 10K service interval or is it inspected/cleaned only?

Btw, how much for the replacement/service of the D4D's DPF?

[Chuck Advanced Member Find all posts View Profile Close Chuck]

DPF (I hate acronims) if you mean the fuel filter it is only when the light comes on.


Waits to told he's wrong again.......

[Chippy Addicted PP Member Find all posts View Profile Close Chippy]

You're wrong ... its spelt acronym :lol: :lol: :lol:

Sorry Chuck ... couldn't help myself ops:

Cheers
Chippy

[MTpockets Advanced Member Find all posts View Profile Close MTpockets]

chippy strikes again... unreal chipster :lol: :lol: :lol:

[Big Fella Senior Member Find all posts View Profile Close Big Fella]

I believe that the new Prado does not have a Diesel Particulate Filter. After going through tne Yota CD I have not found any evidence of one being on the car. I chased this subject with Toyota recently as I was doing my oil change research at my local Caltex Depot and the owner was telling me a story of a P@#*&^ with a DPF. He sold them them Delo 400 and when it was put in the motor ran like a dog. They did some investigating and found that it had a DPF and needed special oil, which Caltex did not supply at the time and the owner had to go to Mitso and buy the genuine oil at about $20 a litre. Caltex guy could not get any specs off the oil bottles (1lt bottles) as it was all in Japanese or similar. Believe me I was freaking out at this one, especially with oil at around $20 a litre even when Clatex has finished development versus $80 for 20ltrs of Delo 400. Aparanty it all has to do with the amount of exhaust gasses (upto 25%) that get fed back to the motor. The new euro spec motors (I think euro5) need to have this feature to meet emissions regulations and the oil has to cope with all the extra varnish, lacquers and pariculates as a result.

This is how I remember it all being explained to me about two weeks ago.

My brain hurts now so I'm going.

All the best, hope it helps........kind of.

[SSbaby Member Find all posts View Profile Close SSbaby]

Interesting post, Big Fella.

I thought all modern diesels had the diesel particulate filter to reduce NOx emissions, a-la Euro spec diesels?

[Big Fella Senior Member Find all posts View Profile Close Big Fella]

No, not at all so it seems. CAT, Cummins etc are starting to introduce this technology into their truck motors for next year. The Caltex guy tells me that it is on the exhaust side of the world, just like a cat on a petrol car. He (Caltex) are being very cautious in what information they hand out to current spec (after june/july 07) diesels. As I said nothing in the manual about it nor from Toyota H.O. in Sydney. The oil spec for the current Prado is a CF but the current spec oils are now up to CI/CJ. So the Prado oil is quite low-tech to say the least. I know I will be using the Delo 400 on mine and then when the Delo 400LE is available (which is the expensive one) I will use it when the price starts to come down to a more reasonable level. That should be the oil for the new spec diesels from what I am being told, hence the LE (low emmisions) tag. This subject did my head in for nearly 3 days last time I was home. I checked with my mechanic and he said he would be using a 10W40. I did not like this as I did not want to have a mixture of oil viscosities in the car. I would drop it down lower viscosity for a holiday at the Snowy's but thats about it. My mechanic did not seem all that happy or interesed that I was doing a 5k oil change and has been a bit lax in his servicing lately on my old Prado. So now I have the daunting task of looking for someone new that I can trust with my car.

Bugger, been ranting and raving way too long now.

No wonder my wife says I'm anal with things like this. I just can't help but get right into it.

The 'rain man' cometh

[SSbaby Member Find all posts View Profile Close SSbaby]

Excuse my ignorance... but are we on the same wavelength here?

I'm referring to the diesel fuel. Are you referring to the oil in the engine ...because I see no relationship between lubrication and emissions?

The DPF is housed [usually] in the exhaust. See here:



http://www.theaa.com/motoring_advice/fu ... lters.html

[Big Fella Senior Member Find all posts View Profile Close Big Fella]

SSbaby,

When I first encountered this subject I was initally confused. However after talking to few people in the know, the lubrication plays a major role in the DPF process. I was also talking with a Holden R&D engineer tonight on this subject and he confirmed the information from Caltex that I received. He was saying that oil is one of the most crucial elements to an engine. I had oil problems when I had my SS ute and a quick talk to the techo's resolved my oil issues.

I have read the article with interest that you attached and have noted that some manufacturers are relying on a additive stored in a separate tank and then mixed with the fuel. As I said in my previous post

The Caltex guy tells me that it is on the exhaust side of the world, just like a cat on a petrol car.

I know that it may seem silly that oil has a role to play in this, but it is very important, especially when the modern engine has enough sensors in it to determine the quality and grade of oil and fuels being used. There is a major relationship to be had between oil and emissions in the modern turbo diesel engine.

Also just found this information on the web from the Diesel Particulate Filter Manufacturers Task Force "Arbeitskreis Partikel-Filter-Systemhersteller"

9. Quality of fuel and lubrication oil

Standard Diesel fuel nowadays usually has a sulfur content < 15 ppm, which is harmless.
Higher sulfur content fuels are yet prevalent, particularly for off-road vehicles. When the
sulfur content exceeds 30 ppm, some DPF are affected. These are the CRT or similar NO2
regenerating filter systems. The sulfur inhibits the NO2 conversion. The regeneration retards
and finally ceases. Consequently, the filter is overburdened and usually is destructed.
Higher sulfur content also has a gradual effect. Periodic “store and release” of lubrication oil
can cause several problems. Present day lubrication oil continues to have a very high sulfur
content: 8,000 ppm is not infrequent. Thus sulfur is in the exhaust-gas despite low sulfur fuel.
Lubrication oils also contain metals (up to 8%). These are deposited as metal oxides ash in
the filter and gradually clog it. Gypsum (calcium sulfate) is particularly aggravating.
Another lube-oil related problem is the rather content of high boiling-point mineral oils. During
light-load operations, these are adsorbed and deposited in the filter. Lube-oil deposits have
very high calorific values compared to soot, which is deposited at very low density. Hence,
impermissibly high heat release and temperature spikes occur during the regeneration.
All these problems are exacerbated, if the engine suffers high oil consumption. Hence, the
engine oil consumption should be monitored. It should not exceed 0.5% of the fuel
consumption, and at 1% is an alarm condition.

I hope that this may have cleared the mud up a bit for you. It may seem that I have dribbled on a far bit, but I'm just passing on what I have researched.

[SSbaby Member Find all posts View Profile Close SSbaby]

Nahh, you're good, Big Fella. I did say please excuse my ignorance. :lol:

Thanks for clearing it up! :wink:

PS On that basis, might be wise to change the oil more regularly?

[Big Fella Senior Member Find all posts View Profile Close Big Fella]

SSbaby,

Nah, I would say that as Toyota recommend a 10k oil change and I will be doing a 5k change as well and we don't have a DPF that should be well and truly enough even with our crappy diesel. My oil with 4k on the clock is just starting to get dirty now.

I edited my last post with a bit of extra info I got on DPF's from the EU union.

Cheers

[RUSTY Junior Member Find all posts View Profile Close RUSTY]

Hi Big Fella, just wondering when the Delo 400 Le oil will be relased in australia??? Thanks Russ.

[Big Fella Senior Member Find all posts View Profile Close Big Fella]

Rusty,

From what I can gather from my sources it is available now but its very hard and expensive to buy. If you want I can have a bit of a hunt for you.

[RUSTY Junior Member Find all posts View Profile Close RUSTY]

Big Fella, That would be great . I have been racking my brains out the last week trying to pick a better oil than the dealers use. My brother inlaw is a diesel fitter and he reckons the delo 400 is the way to go. Thanks mate, Russell.

[Big Fella Senior Member Find all posts View Profile Close Big Fella]

Rusty,

I am running the Delo 400 in my car right now and have no issues as yet. Give us a couple of days to find out some info on the LE (public holidays etc are a killer on the information highway).