I'll add my voice to the Shell brigade, in the beginning (for me, 2006) V-Power diesel wasn't available everywhere so I used Sasol but now only Shell and probably 99% at Shell Isando Motors as it is my closest.
I have a 2006 320d with 126,000km on and I think only one tank was "regular" diesel as it was an emergency.
I have a 2006 320d with 126,000km on and I think only one tank was "regular" diesel as it was an emergency.