Originally Posted by Bunny
This year, because my engine had been standing for so long, I decided to drain the sump and transfer the contents to the tank before starting it up. I was surprised to find that a full 2 litres of oil drained out of the engine.


How much oil drains back through the pump into the sump? Or can it even do that?

The light at the end of the tunnel is actually a train. 2019 M3W