+1 I would drain some oil using the drain bolt in the oil filter housing. You don't want to drive around with too much oil since the crank splashing into the oil will cause oil foaming and this can lead to bearing failure.
I don't think using non-BMW-LL01 approved oil is a big deal since you used an approved weight (5w30). BMW recommends LL01 approved oil to allow their crazy-long 14K mile oil change intervals. If you change out the Mobil 1 5w30 oil at the normal 5K to 7K interval you should be fine.
Quarts and Liters are almost equal. 1L = 1.057 quarts.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater