The N63TU engine has a giant oil sump, 9 liters for an oil change. Add 1.5 quarts if you get the low oil warning and check the level 800 miles later.
Right now my 650i is half way between full and low on I-Drive, going to add a quart in the next day or two. My 650i goes through a quart every 4-5K miles.
Actually gives me something to do.
