When I initially purchased the car I averaged 750 miles as well. I took the car into service back in January and they replaced some of the oil hoses, but no results.
The car is stock minus the Dinan tuner, so I would guess right around 600HP- please feel free to correct me if I’m wrong
I also park in the same spot daily and haven’t seen any external leaks, in addition to not smelling or seeing any indications of excess oil burn. I’m racking my brain over this- close to trading the damn car in for a AMG GTs.