Now I'm a believer!!!! Had some fresh 15% mixed it up and runs great idles good and makes good power on top end,have 2 stroke plug in now so it died when I pulled heat off, and still not as clean as pure gas (oil residue) but what the heck, I will try a four stroke plug , and even if i have to use an onboard glow driver I will still shed the flywheel and coil weight and that is a big weight savings. Av8tor you were right it was the old fuel
P.S. I scored 3 gals of 10% nitro/10%oil powermaster at lhs Thanks for yall's input
P.S.S. No modifications of carb were needed and needle settings were close to what they would be for gas