You don't need dismantle it and fit oilers.
I don't think my Myford mill has them – or if it does it's those infuriatingly tiny sprung-ball things apparently intended for lubricating the surrounding paint-work. Nor does my small Denbigh horizontal mill. Without going and looking, I am not sure if my Harrison lathe's saddle has oiling-points for the ways. (I use grease on the milling-machine screws though.)
Wind the table to each end of its travels, oil the exposed surfaces and feed-screws liberally (you might find a small brush the easiest way); and the oil will soon reach the still-hidden areas.