Heh!
I've been involved with dozens of these gear oil threads over the years...
I've already given my recommendation, e.g. what I run in my Honda transaxles.
Whatever you guys decide to run, MAKE SURE IT'S GL-4 RATED GEAR OIL!!!
Specifically, DO NOT USE GL-5 OIL (the easiest one to find). It'll eat your synchros...
If it isn't GL-4, you're rolling the dice!