Have a 16' 235i manual non LSD. I researched online weight for rear diff. oil. Got a few numbers back, so went by BMW and chatted with service manager and parts guys...they said def. 75W85.
When I look and search online, Redline (and others) comes up with 75W85.
https://www.ecstuning.com/b-redline-...art/50104~red/
Note: Redline 75W85 is extremely slippery, and as a result is not recommended for manual transmissions with synchronizers.
Don't all manual BMW's have synchronizers ? Thought I researched online lol I could go over pay for OEM at BMW, but trying to reconcile this.