Does the start/stop mechanism and premium fuel effect the regeneration process?

I stumbled across a couple of issues which seem to do the rounds on various forums, so I thought I'd ask here for a definite answer. One is that the Start-Stop mechanism, as implemented in the Audi A6 2.0 Ultra S Tronic, is having an impact on the regeneration process overall, in ways which could impact the aftertreatment system in the long run. Also, the use of the Shell V-Power diesel - which personally I find fantastic - with its propensity to make the engine run at lower revs in the S Tronic, make it more difficult to achieve the higher temperature required for active regeneration, with long-term effects on the health of the aftertreatment system.

Asked on 3 April 2017 by Jon Jones

Answered by Honest John
Possibly not. Reducing NOx creates more soot which is why active regenerations occur more often after the fix. But it could be that V-Power reduces the amount of soot so the DPF does not need to regen as often. I'd switch off the stop/start function.
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