Can anyone tell me what the oil ash limit is please?

 

I've looked at various VAG forums and they all seem to be absorbed with soot. The oil ash count seems to be important, as when it's reached a designated value - game over for the DPF (so I'm told). Mine is at 0.07 at the moment. Units are (I) Litres?

 

I've only just started taking an interest in it, as on it's run around this weekend it made a few little passive re-gens, and then did an active one at 440 miles and 75% on the horizontal green/ yellow indicator.

 

It's done 83+k and not had the fix. I appreciate the figures on the app are not "real", but probably resulting from the differential pressure sensor algorithms, but I'm sure it gives the clearest clue as to what is going on.

There are companies that recommend a clean at about 80,000 miles, it's taken off the car and is given a chemical clean.
The VAG specialists near us in Lincoln charge £239 for that.

 

This seems to show it in grams.
 

3 hours ago, Yety said:

Can anyone tell me what the oil ash limit is please?

 

I've looked at various VAG forums and they all seem to be absorbed with soot. The oil ash count seems to be important, as when it's reached a designated value - game over for the DPF (so I'm told). Mine is at 0.07 at the moment. Units are (I) Litres?

 

I use the (paid for) VAG DPF app with my Shark stage 1 2014 Yeti 140 BHP (4x4) and my oil ash is currently 0.06. There is a percentage in the box, which I'd assumed to represent how full of oil ash the DPF is calculated to be?

 

Mine is currently at 34% (car has just clicked over 63k miles), so assuming oil ash accumulates in a linear fashion, I'm hoping to see >100k miles before oil ash levels reach critical.

 

I posted regarding DPF Ash Oil back in September 2017 and Weasley's reply was highly informative: https://www.briskoda.net/forums/topic/438744-dpf-ash-oil-level/?tab=comments#comment-4934214

17 minutes ago, pinkpanther said:

I use the (paid for) VAG DPF app with my Shark stage 1 2014 Yeti 140 BHP (4x4) and my oil ash is currently 0.06. There is a percentage in the box, which I'd assumed to represent how full of oil ash the DPF is calculated to be?

 

Mine is currently at 34% (car has just clicked over 63k miles), so assuming oil ash accumulates in a linear fashion, I'm hoping to see >100k miles before oil ash levels reach critical.

 

I posted regarding DPF Ash Oil back in September 2017 and Weasley's reply was highly informative: https://www.briskoda.net/forums/topic/438744-dpf-ash-oil-level/?tab=comments#comment-4934214

 

Thanks for the link, yes mine is the paid for version as well.

 

How do you see the percentage in the box for oil ash? No mention in help, and the unit symbol is surely litres? All the other units of measure are obvious - strange, the only thing I'm interested in is a 0.07 of something

I'll check tomorrow and post up a screenshot

13 hours ago, Yety said:

Can anyone tell me what the oil ash limit is please?

 

I've looked at various VAG forums and they all seem to be absorbed with soot. The oil ash count seems to be important, as when it's reached a designated value - game over for the DPF (so I'm told). Mine is at 0.07 at the moment. Units are (I) Litres?

 

I've only just started taking an interest in it, as on it's run around this weekend it made a few little passive re-gens, and then did an active one at 440 miles and 75% on the horizontal green/ yellow indicator.

 

It's done 83+k and not had the fix. I appreciate the figures on the app are not "real", but probably resulting from the differential pressure sensor algorithms, but I'm sure it gives the clearest clue as to what is going on.

An active regen at 440 miles is good going, quite often they happen well before that distance.

There is also a distance limit after which an active regen will occur anyway, regardless of soot load. I suspect you're not far off that distance.

 

I'm not sure how reliable the app's percentage bar is; mine tends to regen when either the calculated or measured soot values get over aound 18g; at which point the percentage bar is nowehere near 100%; I think 100% probably represents the soot load at which you'd need a forced regen - hopefully you'll never get that far!

 

In terms of ash...I too can't find a conclusive answer on what the "maximum" limit is before replacement is required.

Mine is just shy of 100k miles and my ash value is lower, but that maybe because someone may possibly have er, accidentally reset the ash value to zero in VCDS quite some time back....

Mine is doing active regens far more often now though, and when doing so it struggles to reach the required DPF temps in slower traffic despite the additional fuel being injected, and during slower urban driving it's smoking more and more during regens (unburnt fuel smoke). I wonder if the ash load is causing this - or maybe the incorrect ash load in the ECU is screwing up some modelling of the required post-injection quantities.

On 14/01/2018 at 23:31, pinkpanther said:

I'll check tomorrow and post up a screenshot

As per screenshot (below) my oil ash residue is 0.06. I'm assuming the 34% is representative of how full it is?

 

On this basis I'm hoping for >100k miles before the DPF is "full" and requires replacement.

2 hours ago, pinkpanther said:

As per screenshot (below) my oil ash residue is 0.06. I'm assuming the 34% is representative of how full it is?

 

On this basis I'm hoping for >100k miles before the DPF is "full" and requires replacement.

 

Aha - my screen doesn't show a % figure, hence the question. Thanks.

The app recently had an update. My engine type is CFHF, not shown on the app. I'm wondering if my engine type is correctly allocated - I'll experiment with engine types as I think wasn't available when I first tried it out. There is an option to let the app choose, just tried it and it thinks it's CFHA - which it isn't, and no %.

At some point in the last week or so, my "DPF Input Gas Temp" box has been greyed out with "nd" (no data) in it.

Prior to that it always showed what appeared to be a realistic temperature.

Has that happened to anyone else ?

All other data continues to update as usual.

2 hours ago, muddyboots said:

At some point in the last week or so, my "DPF Input Gas Temp" box has been greyed out with "nd" (no data) in it.

Prior to that it always showed what appeared to be a realistic temperature.

Has that happened to anyone else ?

All other data continues to update as usual.

you can turn boxes on and off by tapping box on screen maybe yours has been turned off.

On 17/01/2018 at 15:24, idleness said:

you can turn boxes on and off by tapping box on screen maybe yours has been turned off.

It really was that simple....thanks!

I'm now at 0.07 l (40%). Seems the app steps up in 6% increments.

49 minutes ago, pinkpanther said:

I'm now at 0.07 l (40%). Seems the app steps up in 6% increments.

On mine I don't get the % readout just 0.11l seems not to have changed since I've had the app (5000miles). Using maths from your figure I make it that mine is 63% at 100,000miles so it should reach 100% somewhere about 160k. :(

 

Edited 29 January, 20188 yr by idleness

17 hours ago, idleness said:

On mine I don't get the % readout just 0.11l seems not to have changed since I've had the app (5000miles). Using maths from your figure I make it that mine is 63% at 100,000miles so it should reach 100% somewhere about 160k. :(

I had initially hoped to see a similar DPF longevity, but have plotted my (admittedly limited) number of data points and see my DPF is likely to be at 100% Oil Ash Residue at around 120k miles.

 

Whilst I'm certainly no statistician - I realise the above is based upon:

• only a limited number of data points (3 thus far)
• extrapolation
• assumption the calculated Oil Ash Residue is an accurate representation of actual values
• Oil Ash Residue continues to rise in a linear fashion
• 100% = 0.18 l

it would appear I'll need a new DPF around October 2020.

 

All things being considered I guess 6 years / 120k miles is more than likely well beyond the predicted lifespan of a component such as a DPF (HonestJohn often quotes  ~80k miles as the time to expect issues with emissions related paraphernalia on a modern TDi).

 

At the present time I'm planning to run this car long-term (plans in place for cambelt / water pump replacement and 312 mm front brake upgrade) so will continue to monitor DPF filling and may research options for cleaning the DPF (Ceramex etc - http://www.ceramex.com/home/)

 

 

 

 

 

If your graph is correct that puts me at 80% 120k will be within 15 months for me. I am also planning long term have had big brakes done and remap. Oh well just have to deal with it when it happens....

11 hours ago, idleness said:

If your graph is correct that puts me at 80% 120k will be within 15 months for me. I am also planning long term have had big brakes done and remap. Oh well just have to deal with it when it happens....

I suspect DPF cleaning / reconditioning (and refitting) will become big business, partly driven by the enhanced MOT checks planned this year.

 

I'd heard of Ceramex (HonestJohn regularly recommends the process) and plan to contact them and confirm likely costs. It will also mean the car being off the road until the DPF returns, but it maybe possible to combine a DPF cleaning with cambelt/water pump.

 

I still recall a place not too far from me offering both DPF delete and diesel MOT.  The signs offering both were side by side for many years, although no longer!

Edited 30 January, 20188 yr by pinkpanther

On 30/01/2018 at 10:24, pinkpanther said:

I had initially hoped to see a similar DPF longevity, but have plotted my (admittedly limited) number of data points and see my DPF is likely to be at 100% Oil Ash Residue at around 120k miles.

 

Whilst I'm certainly no statistician - I realise the above is based upon:

• only a limited number of data points (3 thus far)
• extrapolation
• assumption the calculated Oil Ash Residue is an accurate representation of actual values
• Oil Ash Residue continues to rise in a linear fashion
• 100% = 0.18 l

it would appear I'll need a new DPF around October 2020.

 

All things being considered I guess 6 years / 120k miles is more than likely well beyond the predicted lifespan of a component such as a DPF (HonestJohn often quotes  ~80k miles as the time to expect issues with emissions related paraphernalia on a modern TDi).

 

At the present time I'm planning to run this car long-term (plans in place for cambelt / water pump replacement and 312 mm front brake upgrade) so will continue to monitor DPF filling and may research options for cleaning the DPF (Ceramex etc - http://www.ceramex.com/home/)

 

 

 

 

 

Currently on 71k miles and VAG DPF is still quoting oil ash residue at 0.07 (40%). I'm assuming a "jump" is due anytime soon.

 

I checked the car yesterday and saw it had covered 370 miles, since the last active regeneration. I'd previously tended to see 100-200 miles between active regenerations, (since the Shark remap) and wondered if the recent hot weather conditions had aided the passive regeneration process, thereby negating the need for active regeneration?

 

Edited 8 July, 20187 yr by pinkpanther

I don’t think one gets passive regeneration at all unless one uses extreme revs - as I discovered while playing with my app. Certainly not possible with normal motorway driving. Like you I normally get 200 miles between regenerations with my motoring being mainly short journeys. However on a long journey to Isle of Mull and back the regeneration interval was 475 miles. I put this down simply to the lesser production of soot on the long journey. Current hot weather not affected my now normal 200 mile interval.

On 30/01/2018 at 10:24, pinkpanther said:

I had initially hoped to see a similar DPF longevity, but have plotted my (admittedly limited) number of data points and see my DPF is likely to be at 100% Oil Ash Residue at around 120k miles.

 

Whilst I'm certainly no statistician - I realise the above is based upon:

• only a limited number of data points (3 thus far)
• extrapolation
• assumption the calculated Oil Ash Residue is an accurate representation of actual values
• Oil Ash Residue continues to rise in a linear fashion
• 100% = 0.18 l

it would appear I'll need a new DPF around October 2020.

 

All things being considered I guess 6 years / 120k miles is more than likely well beyond the predicted lifespan of a component such as a DPF (HonestJohn often quotes  ~80k miles as the time to expect issues with emissions related paraphernalia on a modern TDi).

 

At the present time I'm planning to run this car long-term (plans in place for cambelt / water pump replacement and 312 mm front brake upgrade) so will continue to monitor DPF filling and may research options for cleaning the DPF (Ceramex etc - http://www.ceramex.com/home/)

 

 

 

 

 

The VAG DPF app tells me the oil ash level is now at 0.08l / 46%. Current mileage is approaching 75k.

 

This seems to be in keeping with the graph above and (I'm hoping) indicates I'll see another 70k miles, before the DPF requires replacement / cleaning

 

 

Edited 27 August, 20187 yr by pinkpanther

Mine went from 0.11 to 0.12 at or about 110k its still on 0.12 at 115k 

J

149000 miles and 0.11l here, still looking good for almost 240k miles

 

i have 120000miles (190000kms) and 0,7 ash oil.. dont show me percentage of ash.. is it near end or still can go on? regenerations every 200-300kms (150-200miles) after NOX software fix.. before it was applied, mileage between regenerations were twice longer..

Sorry.. ash level is 0.16 on mine car.. so year or two and it is over? 

Cant belive... i read somewhere about 250 ml of ash on some vw passat and 200 k miles..

0.18 is 180ml. And according to app, dpf will be dead but works well..

 

175ml is often suggested as the maximum so at 0.16 (160ml) it's probably almost full.

 

Others have claimed to go above 175ml without negative effects so it's hard to say if it's an issue.