[jabbay]

As in the title.

2017 x5m, 4.4 S63. Drinks 1ltr of oil every 1000 miles. It's getting stupid now, anyone aware of the exact cause being this is and has been a known issue for years now with the only fix I've seen being a complete rebuild leading me to believe the rings or stems really are just crappy from factory, the turbos are dry - not burning from them.

Yeah it's normal - it shouldn't be. The car's stock at 61000 miles.

[M-technik-3]

According to this TSB it's normal

https://static.nhtsa.gov/odi/tsbs/20...49281-9999.pdf

Engine Oil Consumption
Technical Service SI B11 03 13

Oil Consumption specification:
- All BMW engines (excluding Motorsport) can consume up to 1 quart of engine oil per 750 miles at any time.
- Due to the increased engine power, all Motorsport engines can consume up to 2.5 quarts of engine oil per 1,000 miles at any time.

All turbocharged engines also require a complex crankcase ventilation system. The crankcase ventilation system needs to maintain a small vacuum on the crankcase and not allow the crankcase to be pressurized. Pressurizing the engine crankcase can lead to external engine oil leaks and increased engine oil consumption via the piston rings and valve seals. When the load and the boost level of a turbocharged engine is varied, the path of the crankcase pressure is changed. During the crankcase ventilation path transition, a small amount of engine oil will pass through the crankcase ventilation system and is additionally consumed. The additional engine oil consumption of a turbocharged engine, as compared to a normally aspirated engine, is normal and not a defect.


Engine oil: Topping up

When one of the above vehicles displays a message to add 1 quart of engine oil, BMW recommends adding 2 quarts of engine oil instead. The engine's oil sump design allows the additional quart; the result is a total capacity of 9.5 quarts (9.0 liters) of engine oil.

[BlkGS]

My N63TU3 uses no oil. I suspect that it's more to do with how the vehicle has been treated with regards to oil temperature and engine load than anything.

[pbonsalb]

I remember reading in my E90 M3 manual that 1L per 1000 miles was OK. That was an 8400 rpm V8. It never used that much oil.

I would first suspect bad PCV if consuming a lot of oil. If it is the rings or valve stem seals that is a much more expensive fix and I would leave well enough alone as long as possible.

[BIGW0RM]

My old F10 M5 drank 1qt per 1000 miles. It was annoying.

[Tejas1836]

Valve seals