... hey, since i have it, i am using Klotz go-cart oil on the ways ... guessing about 20 wt at room temp.
i use black chain oil on the gears themselves, it has moly and sticks really well. also on shafts that are directly oiled.
don't use moly oils on the wicks, it will eventually fill them up.
and mobil spindle oil on the spindle; bot a 5 gallon can years ago from Mobil dealer.