It's been near 15 months since I drained and refilled the E83 GM transmission with this fluid:
The transmission is still shifting normally. So I guess it must be OK for it. But I would expect so because this fluid was sold to me by the BMW dealer - it was not rebadged BMW fluid, but simply had a BMW label careless stuck onto the bottle with a BMW part number.
Last edited by tempestv8; 01-09-2013 at 06:30 PM.
Reason: Adding more info