New to x6 E71 50i

[REMN4NT]

I used to drive F82 M4 but marriage forced me to get E71 X6. (She wanted suv so bad..)
I always thought E71 was soo sexy, I really got a great deal on it and its got low miles.
So could not pass on the deal, just bought it.

2011 X6 50i
25k miles

However, When I opened the oil cap, the cloud? Or smog whatever you wanna call it just came out. Is it normal for this model? Oil dont smell like burning,
Never seen cloud coming out of oil cap before when I had f82.

Also what is to look out for in maintenance for E70 E71?