LOL! I asked you a question first and you wouldn't answer it.
I was trying to be objective from the get-go of this thread, but apparently that's not working for you.
I would imagine it would be a challenge to find a vehicle or transmission manufacturer who will recommend a fluid other than their own.
I do know from my own personal experience with other transmissions, the fact Valvoline states their Maxlife ATF is suitable for use in the ZF8 (last page here:
Maxlife ) and can point to countless owners who use it in their ZF8s and have for 100's of thousands of miles (Vern diesel with his eco diesel Ram 1500 for instance).
I'm not saying it's the only way to go. I'm saying it's a suitable option of which I've never heard of an issue with.. Well, aside from what someone stated a few posts above that I'd love to see more details about.