never once did i say you made anything up, my original point is, is that cub is very secretive of that info, lets re-read that... CUB is secretive. I dont know what your personal issue is w me nor do i care. again, in the posters case, im sure he will find his needed fluid to be closer to hygard hydralic fluid equivalent and not an engine oil. but again, im sure both would work. i would contact kioti to be sure, if im the owner, as cub cadet has not manufactured a thing since 1981, its simply a name sold. and lawn equipment hydro systems are speced oil all over the board, from hydro fluid to 20wt to 20w50, again they dont manufacture the hydro units, so their input is not needed in anyway, its like looking up gm oil recomendation in a ford manual. again, this is a tractor, not a lawn tractor.