you probably have an oil leak; check your valve cover gaskets, timing cover gaskets, look in ur spark plug wells and see if there is any oil down there, check your oil pressure switch, your vacuum pump, your oil filter housing, the oil pan gaskets, oil level switch, and last but not least ur alternator bracket gasket.. i doubt your car is burning that much oil. I was nearly doing the same until I changed driver side VCG and spark plug tubes, and then more recently my oil pressure switch and vacuum pump O rings.
06 X5 3.0 Toledo Blue Metallic/Light Beige 2:
Adaptive Xenon Headlamps, Panoramic Sunroof, Rear Sunshades,
+Factory Aux Input in Ashtray, Bluetooth, Rear PDC Sensors, Rear Electronic Adjustable Seat Backs,
+White Angel Eye LEDs, +5000k LED H11 Foglights, +Blacked Out Chrome Grill Surround, +Puddle Light Logo Projector
.. more updates to come
PREVIOUS 2002 745i