RanCarr,
Lubing not only applies to what we call gears, pullies, rails and cables. I lube my rubber seals, inside and out, all around all of my slide outs with a specific rubber seal spray on lube. I then lube all visible rails and mechaincal parts, when slides are open or extended, that the slides run on with another product that is a dry lube specific to this appllication. If it is not visible when extended I don't go looking for it. Multiple products are out there and a periodical spray is all that is needed. Don't forget the visiual inspection for large particles of dirt, pebbles, twigs and any other items that can get caught and cause problems. Hope this helps.