For well made, high-performance engines, the rule of thumb is 1 qt used every 900 - 1200 miles. Short distance drives will use more as the engine has to heat cycle more up to tolerances. My 550i used about a qt every 5000 miles but mostly highway miles. Porsche will tell you 1 qt every 1200 miles - older models were more.
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Sold: 2014 X5 xDrive35d MSport
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