Have another look the oil container denotes 68 for headstock, gearbox, carriage and lead screws. Different oil container picky denotes 32 for the slides.
Will feel quite some drag to over come with hydraulic 68 on the slides.
Been having the odd gallon from Smith and Allen for last 6 years £13 delivered back then now £17. I use it like its going out of fashion a disposable item.
Can pay a few more pennies and get AWD, antiware hydraulic.
ATF the red stuff has similar properties in general to hydraulic and recommended for the old Harrisons (L5, L5a, 11" and 140) headstock. Did try some fully synth 75W gearbox oil but the drag was too much until warm meaning hours of use to get working. This is why modern car oils have a dual viscosity ie 10W/30, when cold the 10W comes in to play, when warm the 30W. Can beat that by going 0W/30W as the 0W flows better when cold.