I'd also periodically check the oil level through the computer so that you won't be surprised in the future.
Both my 128i and 328i burn only about 1/4 quart in 6,000 miles and since I change it at 8~10k, I never have to add. But as you are still "breaking in" your motor and it is a turbo, 1 quart in 5k isn't unusual.
Also, the last time I checked, buying 5w30 BMW branded synthetic from my dealer cost the same or less than Mobil 1 0w40 from a parts store.
Tom
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