[Squid_Boy]

Does anybody use any oil additives like mystery oil or any fuel injectors in their fuel?

I don't currently use anything, but if we are ever forced into using the E15 fuels, I would start adding the Marvel Mystery Oil. Having it in the mix helps to protect against the adverse effects of too much alcohol on rubber seals (and the inside of plastic fuel tanks). It also helps to lubricate the injectors and fuel pump.