Quote:
Originally Posted by shadycat
... even after replacing dpf itself...
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As others say...DPF is a collateral victim of something else gone bad and causing too much soot which ends up in the DPF...
My 5 cyl D3 MY 2013 with 160 kmiles does regen every 1000-1200 kms or even 2000 kms in winter... so your regen is way too soon...even if you are driving only in the city... Oil itself just cannot cause so much difference.
I don't have time to rewrite what helped me when my regens started happening at 600-400 kms, so I will just copy what I have answered in another thread - it may perhaps help you...but no guarantees. I had 5 months and 6.000 kms driven flawlessly after doing that:
"Yes, doing the regen on the motorway for 15-16 minutes between 3500-3900 rpms in 3rd gear worked for me. Did it with cruise control on. And when finished, make sure to drive for another 20 minutes fast but normally in 5th or 6th gear at 2000-2200 rpms to cool the engine and let the possible small amount of fuel which may go into oil evaporate (and of course slow in the end before powering off the engine). All that requires planning to catch the start of the regen on the highway. And also MAKE SURE to follow your car coolant and oil TEMPERATURES with diagnostics while doing the regen as described. Did it twice since last November, and the 3rd regen is going to happen in a couple of days. It will be 6.000 kms since November and everything was fine. Soot accumulation was perfect and slow. In winter my car does the active regen exactly at 2.000 kms driven, because the soot does not reach 25,7 g threshold which starts the regen usually. Probably in winter if it's not too cold we get better combustion cause dense air has more oxygen...
Let me repeat - WARNING - do it at your own risk - and DON'T do it without live diagnostics which follows the coolant and oil TEMPERATURES!!!
My coolant temperature barely crossed 90-91 C and oil reached max at 109-110 C.
I did it twice that way and all was perfect for my car in the last 6.000 kms.
Also make sure to use some premium quality diesel fuel. I got Shell V-Power diesel. Did fill it up few times with lower quality diesel and it could have made a contribution to the problem I had before.
I've chosen to try that instead of Forced regen when idling and very pleased about avoiding the engine idling at 4.000 rpms for half an hour...
When 3rd regen comes in a couple of days I will not do it that way, but "normally" in 2000-2500 rpms range, as I believe twice was enough...for now...
Car is now at 260.000 kms and going great.
Please report back if you do it."