Funny that my owners manual and service manual didn't list the specification for the fluid. The owner's manual said see your dealer, the service manual said to see the parts catalogue, and the parts Katalog that I have downloaded, just has a part number for the fluid. Fun stuff.
ZF has a decent catalog
available online and it shows the fluid specification.
I have been using Valvoline Max Life (full synthetic) in my Hondas that are auto trans, so I will probably use it in my Tiptronic Box' when I get around to doing a fluid change. I just wish that they listed Porsche specifically.
