Not an N55 owner so wont comment on oil consumption but,
LL-04 spec is for particulate filter cars, something about the oil additives not damaging the OPF/DPF. Hence why its prob not available in the USA from BMW.
The oil level sensor in the car seems to be very sensitive to the levelness of the car. I have gotten differing readings within 50-100km of each other. Makes me worried about adding oil and I think I may have overfiled it before (only 200ml or so).
BMW themselves say that M engines can consume up to 1.5L of oil per 1000km!
"Because of their increased power output and torque, M engines have a maximum permissible oil consumption of 1.5 l/1000 km."
https://www.newtis.info/tisv2/a/en/f...fluids/2v3QS5F