I thought the V10 T1 limits were 150 g of ash with
soot reported as percent of duty cycle with a limit of 49%
Values are visible in group 068 or 075 of 01 and 011 for V10.
I've three values in group 068, and only one of them (the second one) is absolute, the others are in percents. That one reads 85 - so if your information is correct, this is the current ash amount, in grams, obviously. It seems to be fairly constant, even though in my latest scan it jumped to 85 from 84 (from >3000 miles ago) - another indication, that this might be indeed the calculated ash amount. I don't know how often it jumps, because the oldest log of that particular group I have is from about 3000 miles ago.
Group 075 show three temperature values (which I guess are the temperature sensors along the exhaust line) and a percent value (which seems to jump around wildly in different logs) - so that can't be the absolute ash amount.
I know the R5 is just half a V10 so perhaps these numbers are useful.
Yeah, but AFAIK V10s have two DPFs - a separate one for each cylinder bank. So, I assume 150 grams is the capacity of a single DPF. Because if it would be those of twos in total, then one would only have a capacity of 75 grams, and I should have already gotten a DPF full warning or something. Right?
Also, someone wrote here
about his Touareg - without identifying the particular engine type and model year he had - that he got a printout from a dealership where his DPF's maximum ash capacity was indicated as 330 grams. So, that's also an indication for a single DPF for a 5-cylinder exhaust having a maximum ash capacity of at least 150-165 grams.
I remember receiving a service update notice from VWOA that dpf’s need replacement at 125k miles. Of course I will ignore that.
Can I ask what your calculated ash amount is in Group 068? Do you have a similar set of values in Group 075, too?