I dwonloaded two manuals in addtion to the "manual" that came with the saw. Essentially the same item but differeing advice. Two had me put in "140 weight gear oil", one had me use grease.
Given the state this thing was out of the box I thought I better open up the gear box and change the oil anyway. The oil was relatively clean. Then I found that there is no such thing as "140 weight etc." In the end I gave it a common 80W-90. Worm gears are only GL2 classification and if the oil is good enough for everything else I am sure it will not kill the saw. In any case I could not see the saw starting up freely in my cold garage with 140 weight in it.
Nice. Mine is very basic. It does not even lock in the vertical position. Having said that the first two cuts (one before and one after I tweaked the guide bearings) were almost identical and within (eyeball!) 0.010" on a 1.25 round mild steel. I cannot see wanting more accuracy than that. In any case the accuracy will be limited by the vise which will need sorting out in good time.