That seems a bit heavy on consumpton. Try to get under the X and see if there is any heavy leaking. You may be leaking oil from the OSV or from the 2 hoses that go to the oil cooler line. Oil leaks are tricky because it could be a number of things. Best case, its the OSV or maybe oven the oil pan gasket. Worse case, the rings are shot. But you didnt have a mention of blue smoke, the the motor isnt consuming the oil, you are just losing it somewhere.

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2011 E70 50i M Sport