Well,
This was an interesting suprise to me!
Amsoil is now recommending their synthethic ATF as a direct replacement for Honda Z1 ATF.
This means that if their ATF were to cause the failure of a Honda transmission, they'd replace it! It also means that if Honda were to blame them for it causing a transmission to fail, Amsoil would sue Honda!
Here is the page I found the info on:
http://www.amsoil.com/products/atf.html
Neato, a manufacture that makes a truely synthetic ATF that has also bitten off the Honda propietary ATF bullet!
Gerhard