there is no correct asnwer to this, lot of research needed then trial and error with oils and blending etc, certain diffs vary in oils they prefer etc and oil good for diff always conflicts with whats good for honda box
was in similar position myself and asked for info from mfactory, spoon , couple guys who build honda boxes for living, friend also with vast experience of honda boxes/oils etc and opies oils
not 1 can give definate answer and many wont actually recommend a specific oil, just hint at what they have used or would recommend "trying" but no gurantee etc
once you look into it it will make more sense why there isnt a specific answer
also remember many oils are for race use, these are not good in daily driven cars