aye ive been running it in my 200tdis for the past couple of years and in the l200 4d56.
The 200tdi in my csw has a heated fuel filter etc and runs quite high percentages even in winter. Doing the conversion solved all my running issues, and the conversion quickly pays for itself in the money saved.
Just being cautious with the beemer engine as i know little about it.
Ive found that once you have done the filter a couple of times the problems tend to reduce as most of the crap out of the system is gone. I clean my oil pretty well too and dont put stuff with animal fats in. I also avoid palm oil as its crap in the winter!
I have a good supplier of virgin olive oil which works a treat and is always immaculate, if rather garlicky!