5 months ago, MAPerformance installed AMS fueling upgrades on Dustin WIlliams' Z. There was an AMS staffer present for the install. Dustin specifically stated that he'd be able to run e85.
I think a well placed phone call directly to AMS should clear this up.
Is this really confirmed? As far as I'm aware, BMW has avoided commenting on the topic of a 6 spd transmission for the Z4. End of model production is said to be 2025, maybe they'll go out with a bang.
Considering that the Z4 and GR Supra are both made at Magna Steyr, a manual would make sense...