NHTSA Complaint #11568036 — 2013 BMW 650I

Due to ongoing issues with the BMW N--63 engine which is known for excessive oil use! They claim that one quart per 750-1000 miles is normal ???Car now stutters on acceleration, BMW serviced the vehicle, changing transfer case fluid ( All fluid was not able to be exchanged without removing the transfer case and that was not done )and recalibrated transfer box. Replaced O2 Sensor as well. Repairs did not solve the issue, slight improvement but stuttering continues. Now they say that to resolve this the transfer case would need replaced !! This car has 52,000 miles on it! Due to the failing fuel injectors the catalytic converter needed replaced at 44,000 miles at a cost of $3,000.00. BMW will never admit to issues with their vehicles. I have owned 8 BMW's and have been through this with most of them!