My next door neighbor Bob, may he rest in peace, was a great guy and old school mechanic. He would borrow equip from me all the time and I never minded that he did. When he returned the stuff it looked and ran better then it had in years. He swore by marvel mystery oil, used it in everything. I dont know how or what mix ratio he used but all I remember him talking about was that stuff, he swore it could fix anything.
Craig