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Had the exact same conversation with my dealer last week (10K). Apparently completely normal. All internal combustion engines consume some oil, albeit not much (unless there is a problem). Replacing every 3,000 miles keeps this from becoming an issue. It all boils down to the interval between oil changes that makes this small consumption apparent. The high performance M cars will burn about 1 quart every 4,000 miles. For our car, I heard every 8 - 10K is the average per quart.
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