It's from rank 4 or 5 >_> I have a full Borg set and I'm only at rank 6 and I definitely got the Fine Lubricant before I reached rank 6. But hoido88 is right, once you get 1 Fine Lubricant, you can exchange 5 Lubricants for 1 Fine Lubricant.
"That stuff in your skull isn't just there to give your headbutts momentum."-Detsuaxhe "There are no continues my friend." - Ocelot