Diesel exhaust survey - do I have a problem?

[850man]

Hi folks,

Newbie to this forum and to X5 ownership here with a question for you experienced people out there... I have a 2012 X5 30D equipped with DPF and only has 65,000 Km on the clock. it runs beautifully and I love it but... the exhaust tailpipes have carbon soot in them. It was there when I bought it and I have cleaned it out several times but it just comes back. It's dry not oily. I never see black smoke when accelerating, the engine uses no oil. I asked BMW at the time I bought it and they said it was normal for a car that had done short trips around town and would clean itself up with a few longer trips.

Since then I have covered 5000 Km, my minimum commute is 25Km at 100Kmh and I have done a number of 250Km trips, given it many bursts of full throttle and initiated 3 DPF regens using Rheingold which have all completed successfully.

The exhaust tailpipes still get sooty inside. Is this normal for a BMW diesel? I have seen other that are clean as a whistle. What do you guys think?