I thought ash capacity was still an unknown? Was a source identified?If the max capacity of our DPF is 380 ml, looks like ronin and myself have used up about 18-20% of the DPF. Still a long way to go before it needs replaced. It appears the build-up rate is still about 10 ml per 10K miles. I wonder if fuel efficiency drops as the DPF begins to fill up with soot?
Soot load is not an issue until it reaches 45 grams. This is not volume related. The various types of regeneration should keep the soot to near the single digit gram level or even zero under normal circumstances. Soot levels can reach 45 grams even tough the DPF is not filled with ash because for some reason soot is accumulating faster than it can be burned via regeneration. Even if all the soot is burned after every active / distance regeneration, ash continues to accumulate as we drive our cars and burn engine oil and diesel fuel. Eventually, there will be too much ash in the DPF and it needs to be cleaned of ash or replaced if cleaning is not possible.
Truck DPFs are designed to be emptied. They have a removable "cap" that allows the ash to be removed. Our DPFs are sealed. My hope is that someone will figure out a way to cut a hole, empty the ash, and then install a cap (or weld it back together) so that cleaning is possible. So far there are not enough VW DPFs with enough miles on them for there to be much of a demand for this service, but that will change in a few years. We shall see what happens. Even if someone comes up with a way to clean out our DPFs, I suspect that there will still be a hefty labor charge, because these things are not very easy to remove (things are pretty tight in there).I just did quick internet search and it looks as if there are many companies that can clean ash from truck DPFs. Is the DPF on our cars so different that it couldn't be cleaned rather than replaced?
Or for the scrap recycle value of the precious metals and ceramics.
Using any fuel additives?Another data point for the thread. I'll post more as I get through each maintenance from now on.
Model Year: 2009
Oil Ash Volume: 39ml
Oil Type: Castrol LL03
Avrg. MPG: 44'ish
Comments: Looks like my ash buildup has been a bit less than others have so far. Most driving is country highways by my wife getting to work and back.
consistent data keeps coming in on ash volumes....does anybody on this site...gurus and techs chime in...know when the DPF is "full" of ash and throws a code and wants to be replaced??Some data from my car...
2010 Jetta TDI Sedan DSG
Mileage: 29,100 miles
Oil: Castrol LL03
Fuel Economy: 38.9 mpg
Daily commute=100 miles round-trip, mostly highway, in passive regen rpm range, well above 2,000 rpm
22:19:37 Group 241: DPF Soot load
30 ml Particle Filter Oil Ash Volume
16.5 Soot Load(g) Calculated
7.5 Soot Load(g) Measured
22:19:37 Group 105: Diesel Particle Filter
00000001 Bin. Bits
4.0 Requested Regenerations
30.6 (no units)
22:19:37 Group 240: Last Regen
28.9 l Fuel Consumption Since last Regen
490 km Mileage Since last Regen
504.0 Time elapsed since Regeneration
Based on the service/maintenance bulletin from VW, it looks like we can get anywhere from 250K-350K miles before the DPF is clogged. Those figures came from calculating the oil ash build-up we are seeing and the value given by VW stating the DPF can no longer "safely" go thru a regen.