Sorry to butt in. I did a bunch of googling and mineral oil is recommended for clutch type lsds. Ive recently tried penrite 80w90 gear oil with one small tube of nulon g70. Cold is pretty meh. But once warm/hot omg. Its like butter and no chatter/horrible clunks/weird looks from people. Its hard to find a balance between cold shifting and clutch noise. But I feel like this option is doable. 80w90 penrite gear oil is like $20/25 and the additive is under $15? So all up 40 bucks... Oem will still cost more. But if I could run oem I would, that stuff is great.