If there are 4 or 5 bars before it says to add oil, each bar represents about 200 ml. In 2000 miles, that is nothing. It is being burned, or it is leaking. There is nowhere else for it to go. If there are no visible oil leaks on the ground (and I wouldn't expect anyt with that low a consumption), then that rate of burning oil is perfectly reasonable.

Use the right oil, keep a log to see how much it uses, and carry on. I wouldn't using anything lower than a 5 for the cold start viscosity (ie 5w-30) and nothing higher than a 40 for the hot viscosity, due to your summer temperatures (5w-40 would be reasonable).

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
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2003 X5 3.0 Steptronic, Premium, Titanium Silver
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