Ive used motor oil in transmissions before with no problem... if you are not going to beat the shit out of it it doesnt really matter... All the honda MTF is, is 10w30 motor oil with some dumb little friction modifier additive to condition the brass syncros... and no one can even confirm nor deny wether it works or not... I say if you are gonna drive ms.daisy, use motor oil, if not step up to syncromesh, syncromax, or redline mtl...