2008 transmision, xfer case, oil, and front diff.
I just completed the above tasks. My X has 129K miles. I bought it with ~123K.
1. The transmission drain I got just under 5 quarts out and almost 5 back in. I filled till over flowing and then started the car. Shifted through the gears and continued filling till it overflowed again. Thought I would get more in. I could not get the filter seal out. Scuffed it up pretty good but just put the new filter back in.
2. Transfer case drained approx 750 ml. Put about the same back in. Fluid looks to have never been changed. Solid black and thick. I did not have to remove the cross bar.
3. Front Differential looks to have also never been changed. Approximately 700ml out and a bit more in.
4. Oil change.... what can I say. It was easy
Took me about 4 hours with 30 minuets trying to get the transmission filter seal out. A little worried about that seal.
2008 X3 M-Sport