It does not use gear oil, Mercon works fine.
Its gear oil
75w90 gear oil
there should be a pipe plug fitting on top or near the top of the transaxle... Motor oil? no, check with a Honda manual, or contact the dealer to find out the specific fluid requirements, most manual transmissions use 80-90w gear fluid...
75w90 gear oil75w90 gear oil
manual transmissions take 90 weight gear grease / oil
75w90 gear oil
pull the check plug it will either be gear lube or auto trans fluid
manual tranny's take gear oil not tranny fluid. you need to get all that fluid out and fill the tranny with 80/90 weight gear oil
you dont put transmission fluid in a manual transmission. you need gear oil, and it should be done by a transmission shop
75W-90 Gear oil
Honda MTF (manual transmission fluid) / MTF2
it should be 75w90 or 80w90 gear oil.