I recently revived some old vise grips and used J4 fluid on the rusty old threaded adjuster. Before it was so rusty I could barely turn it and now it feels as smooth as a brand new one. Now I’ve been using it to soak all of my rusty bolts from my truck while they await reinstallation. I have been wiping off all of the fluid before reinstalling but I think it helps to clean off the bolts and make everything slide off.
Does anybody else have uses for old CVT fluid? Am I wrong to use it on bolts I will be reinstalling? Are there any niche properties of the fluid that make it useful for certain things? It has way better lubricating properties that ATF +4 and imo smells way better.