Glad you are getting it dialed in, engine-man.
I use Marvel Mystery Oil at 20/1 or 25/1
I add it to White Gas (Coleman Fuel or Crown camping gas fuel)
or I use yard tool 4 cycle fuel or 50/1 2 cycle fuel with enough Marvel Mystery Oil to bring that mixture to 20-25/1
I never use automotive gasoline an any of my model engines.
Most of it has ethanol and a lot of poisons designed to be pushed through a cataytic converter at 1400 to 1800 degrees.