[Scubamup]

Hi all, I've got a 2010 C30 with a D3 engine, I do 370 miles a week on an hour long commute which is 70:30 split county A roads to dual carriageway, so you'd think ideal for normal dpf regen.
My issue is my tail pipes are getting covered in black soot in a week. Surely soot shouldn't even be coming out, let alone in that volume.
No warning lights, running on std Shell diesel.
Any thoughts, should I be worried?

Ta

Karl