You guys seriously don't use MMO? Surely a wind up going on here.
As for oils, Leadie is correct about the newer oils with corrosion inhibitors etc (ASL CamGuard) and if you need to run a straight W120 not the W100plus CamGuard would be a worthwhile addition.
As for anything else, you might want red undies, a rabbits foot or anything else you find that gives you warm fuzzy feelings from a superstition.
As for MMO, well if you had some gummed up rings, and you filled a cylinder overnight and let it soak, that could work, so long as you drained it out. MMO is a very light weight paraffin oil, and 25% solvent, 1% dimethylether and some dye and fragrance.
As for adding it t your fuel. Don't.
I can see this thread now taking on a whole new definition of thread drift.