DPF question / values

alsiet2017

Hi All - Anyone have much knowledge of the DPF in an Audi b8 2015? I am trying to work out, as much as possible, how often the active regen takes place. I dont think my car does the "passive" regen, given that the active regen takes place still on a long trip ie. to Dublin.

What I would be interested to know is what is the threshold for the Soot Mass Calc. value before the DPF will regen? The max value is 40G before the DPF light comes on but I read somewhere that around 45% of this value should trigger DPF. My workings are:

45% of the 40G is 18G of soot.
My current soot value is 15.35 G, therefore i would expect a regen once 2.65 more grams are added.
Soot charge rate is .0298g per KM, so i have around 88 KM before a new regen takes place. Does this seem about accurate? I just am interested in trying to predict the regen. I have listed values below from a scan if anyone knows how good, or bad these look. Once I do a few trials, I plan to sample different garages for diesel and see if any of them trigger more frequent regens with the varying fuel quality.

Mileage 38K
Date 21/03/2016
oil Ash Vol 15.2g
oil Ash Vol .3l
soot mass calc 15.35g
soot mass meas 1.67g
calc. charge rate .0294 g/km
meas. charge rate .0298g/km

demanufactured

I wouldn't bother sampling different fuels to see if they generate more/less soot.
In Ireland, Diesel is Diesel, it comes from the same source, we only get wintergrade DERV here , and nothing else.