Thanks for your detailed concern on subject.I could see the problems with fuel mix, but isnt it be useful on ball bearings if used very careful on ball bearings(bushings too) maybe once in a season?.I can see some MoS grease available up to 392F (200 C). Maybe applying carefully on sleeve and piston before break in,helps longer life.
May I ask a little off topic question since I see u experienced on subject?What is your opinion Bill on adding some MoS2 to car engine(turbo diesel) high quality lube oil( syntetic)? Can it be harmful on some systems?Or maybe oil filter collects all and restricts flow?
Asking mainly because I have suffered an engine got slack only after 35.000 miles.(VW 1.9 turbo diesel)