My wife's Avus M5 like to drink her expensive 10w60 oil quite frequently too. Not alarmingly frequently, but under what BMW considers "normal" for regular driving. (06/99 build date)
On the same note, mine, hardly burns any oil, no matter the driving. (06/00)
My e34 M5 burned very little, hardly ever needed to top it off between oil intervals (5-6K) and my e30 drank the shit.
www.enthusiastauto.caNeed a car???
--'00 BMW ///M5 .:Jet BLK/BLK:. Individual-1 of 1 - Style 65 Wheels; 9.5" Square Set up;275 Tires;10mm/3mm Spacers; Black Kidneys;Muffler Delete; 3.5" Dual Tips; Beast Power; "Dinan" Ducts; E60 SSK; BC Coils
--'04 Volvo S60R/6spd.:Nautical Blue/Gobi&Black
'00 BMW ///M5 .:Avus Blue/Grey/Black:. 1 of 8 SOLD
'88 BMW 635CSi Blue/Tan Sport
'81 MB 500 SEC Euro Koenig