Your postulate is wrong here as in this case water should also contain some arsenic to begin with for the logic to be correct.

 

To my understanding - combusted diesel will release soot particles that DPF will catch and later burn, which in turn will leave ash residue in the DPF.

Combusting (excessive amounts of) engine oil is bad will eventually create ash and/or other forms of deposits in the DPF as well - there's no question about it.

 

So, it all just comes down to the designed/expected ratio of diesel to oil during the course of life of a DPF filter.

If 1 liter of combusted engine oil will produce as much ash as the quantity of diesel required for 200.000 km of driving - then of course it's all but negligible and a car with very high oil consumption will still do very frequent DPF regens and the filter will get clogged up very quickly.

 

Rather than theoreticising about it, it can be calculated based on scientific data OR - more importantly - if someone was in the same shoes as me and can tell us their findings based on getting the DPF cleaned but still sticking with worn piston rings (or whatever) - that should provide us with a pretty good answer.

 

So, until someone shares their PRACTICAL experience or I do it myself to find out - I guess we won't have a definitive answer to it and we're just wasting time discussing it and doing the guesswork.

 

Cheers,

2 minutes ago, cybernck said:

until someone shares their PRACTICAL experience or I do it myself to find out

I think you're going to have to be the guinea pig here...

5 minutes ago, cybernck said:

Your postulate is wrong here as in this case water should also contain some arsenic to begin with for the logic to be correct.

 

To my understanding - combusted diesel will release soot particles that DPF will catch and later burn, which in turn will leave ash residue in the DPF.

Combusting (excessive amounts of) engine oil is bad will eventually create ash and/or other forms of deposits in the DPF as well - there's no question about it.

 

So, it all just comes down to the designed/expected ratio of diesel to oil during the course of life of a DPF filter.

If 1 liter of combusted engine oil will produce as much ash as the quantity of diesel required for 200.000 km of driving - then of course it's all but negligible and a car with very high oil consumption will still do very frequent DPF regens and the filter will get clogged up very quickly.

 

Rather than theoreticising about it, it can be calculated based on scientific data OR - more importantly - if someone was in the same shoes as me and can tell us their findings based on getting the DPF cleaned but still sticking with worn piston rings (or whatever) - that should provide us with a pretty good answer.

 

So, until someone shares their PRACTICAL experience or I do it myself to find out - I guess we won't have a definitive answer to it and we're just wasting time discussing it and doing the guesswork.

 

Cheers,

So, I had my DPF cleaned TWICE, because of the oil consumption. It works well for around 3-4 months, then it starts 'degrading' again. The burned oil doesn't produce the same type of soot that can be burned off ( as I'm told by the cleaning shop ). It's more like 'tar'. 

So, cleaning the DPF will be beneficial in the short run, but getting the oil consumption issue fixed should be a priority. 

 

I was booked in for piston changes this week, but all shops are out of stock for kolbenschmidt pistons. 

I will be able to give a more valuable input after I replace the pistons and clean the dpf for a third time and a few months will pass by. 

I feel like I may have said all of this yesterday... Thanks for posting up confirmation.

Great, thanks for the very valuable input @BogdanB and @varooom

 

Additionally, I've just stumbled upon an article (about diesel trucks though) that states that 90% of ash in the DPF is formed by way of combusting engine oil.

 

Therefore, for anyone reading this in the future - we now have a definite conclusion in terms of cleaning the DPF along with the engine using excessive amounts of oil - no point in doing it.

You can lead a horse to water.....................

4 hours ago, J.R. said:

Why do you think there was such a need to create low SAPS oils if combusted engine oil has a negligable effect on a DPF?

 

Its like me saying that 1mg of arsenic is nothing compared to the 2000g of water I drink a day.

Low saps, mid saps are fine for DPF. I use mid saps oil by Millers that is vw507 spec. What I was saying is that the actual amount of oil burned is negligable short term and will not clogg up quickly. A DPF should last over 100,000 miles approx if driven as they should be. So it would take a while to block up again even with short runs.

 

4 hours ago, J.R. said:

 

 

 

Edited 7 November, 20223 yr by Ecomatt