He didn't have Carlube LM2 grease either
The original oils I used always seemed to vanish after a very short time. I've not tested this LM2 for long, but from what I can see so far, it's just as wet in the bore as it was when I put it there. Also with a greased mop, you can feel where the bore is dry and then gets greased up as you pump the mop. The oils never felt as easy to feel the bore. I expect it's because the oils were quite thin and do not offer so much resistance. The LM2 has quite a bit of drag and even more when it's running over a dry patch of the bore.
I can see where you are coming form with testing using the original oils, but to be honest, if the LM2 works after an air line, I'll stick with that, as it doesn't seem to run out the touch hole or muzzle in storage! (I know, muzzle down for storage anyway!)