[Superman]

I totally yield to the many who understand these matters far better than I. Respectfully, 911 engines have seven main bearings, according to my recollection. This suggests to me that crankshafts are likely not wobbling much and even if they did, I question how much this would contribute to oil consumption. If oil is burning, then it is entering the combustion chamber. It is getting past the rings or valve guides or both. In the hands of a skilled technician, compression testers and leakdown testers (and the technician's ear) can provide more information about the condition of those rings and guides. In the meantime, like one or more others, I suspect there may be an oil leak. What does the bottom of the engine mounted oil cooler look like?