Anti-Friction Lubricant

There have been a good number of metal treatments over the years. Avblend for aircraft, and Lenkite for auto's(their the same product different names). I'm sure there are others. But the hands down all time winner is Marvel Mystery oil.(not technically a metal treatment but nearly as miraculous). When I use to inspect airplanes, I would blurt out to the owner "Don't put Marvel Mystery oil in the fuel", and they would say "How did you know?" It would deposit little clear beads on the plugs that I would have to clean off, and they would smell like Oil of Wintergreen which is in it. I would follow it up with "Why put anything in your fuel that's a mystery? But hey, in a car, I'd give the Maxilube a go. The Germans have an incredible lubricant, kind of like Vaseline, but the brand is VienerSlider. Very expensive.