a) I do not get a forced regen every 500 miles
b) I do short journeys typically under 10 miles each way, I rarely use a motorway.
c) I mainly use country roads at over 50mph as NSL allows
d) I don't see the revs drop below 2000rpm unless slowing or stopping, car is auto 4x4.
The latter I think is most important, the auto box is always in the right gear and so the revs stay up and keep the DPF at cooking temperature. The motorway cruise won't make the motor work hard enough unless you drop a cog and going fast enough in top attracts unwanted attention. You want over 60mph and 3000rpm for the Italian tune up.
The fuel consumption is not the best but no worse than expected of a vehicle this size, the 184 auto 4x4 being worst current model for this. The Viezu remap has improved mpg by +15%, from 24mpg to 28mpg :-( but the power is way up, more efficient and far smoother delivery. That increased efficiency also means the the DPF is even less likely to fur up and go into normal regen (which most folk don't even notice, no dash lights show).
Edited by: jefrs