It is very common. Using one quart in 5000 miles is typical oil consumption. Easiest thing is to just add a quart of oil, but you can go by your dealer since you are in the US and they will add it for you.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue