I have Passat 2.0 PD (170PS) with a DPF. I used to use Tesco Diesel, but mainly becasue I really only do short journeys these days, the car was frequently ( about every 200 to 250 miles) going into an automatic DPF regeneration cycle. Occasionally the the DPF light came on and despite taking it for longer runs at over 2000 rpm on 3 occasions the engine dropped into limp home.
My tame garage would use the ODB port to initiate a high level DPF regeneration which requires driving at 50mph for about 20 to 25 miles to decoke the filter.
I now have my own ODB reader and interface, and can start the high level cleaning process.
But I have also changed to using one of the branded super grades, and the distance between auto regen's has improved considerably.
The DPF issue is one reason why I am considering changing the car, the other is Birmingham will be introducing its £10 pollution charge soon, and coupled to my much shorter journeys with teh odd longer stretch. a Plug in Hybrid would seem to offer me the necessary flexibility , and reduce both my costs and pollution footprint.