Been discussed MANY times, for many years. My 2010 750i needed a quart every 2000 miles or so. For some reason, my 2012 AH 750i never needed oil. But every person I know that has a 2009-2012 7 Series, must add oil regularly. We had a 2010 Rolls Royce loaner a few months back, and the warning message came up to add a quart of oil (BMW based system and car). So far, my 2012 Rolls has not warned of oil. Our last Porsche Turbo 911 (2009) went thru a quart every 500-1000 miles!!!! :-o
I find it funny that BMW's free Scheduled Maintenance does NOT cover this needed extra oil. Many dealers provided the oil for free, but some do no. My awesome BMW Advisor used to just sneak & hand me a quart. When he left, his replacement would charge me about $9.50 for a qt. of BMW branded oil. I would just buy my own Castrol for much less.
2013 Rolls Royce Phantom Sedan,
2013 Phantom Aviator Coupe, 2013 G63 AMG