Amsoil Saber about 80-1, my Strikemaster has never ran so good.
I would agree for my Strikemaster. I had nothing but issues with the carb acting up and rough starting and running and alot of smoke since day one. I cleaned the whole carb and started running 80:1 Amsoil and have never looked back.
Smooth running, virtually smoke free and no fouling issues, etc.
This oil saved me from dropping my gas and switching. However, I am glad I did not because I really like the SM auger I own!
I am just a consumer not horse in the race, just very satisfied.