Not to keep beating a dead horse, but during my research, I'm astounded by how many break-in procedures were done with the wrong diff fluid, just check out the order sheets throughout the thread:
https://f80.bimmerpost.com/forums/sh....php?t=1007985
Put that together with the thread below this one on vibrations:
https://f87.bimmerpost.com/forums/sh....php?t=1492544, and it makes for a hilariously maddening reality.
One of the most expensive consumer products damaged by what is possibly one of the simplest and most basic procedures.