Bob, I know this will drive ya nutz but there are many, many thoughts on this. Opti 100:1 and dyno (non-synthetic oil) and a few others.
Your engine is not gonna implode if ya follow any of what is suggested. It won't. Also, it is a POS cast engine made by a guy who went to work bare foot 'cause it was his wife's turn to wear the shoes that day.
Not advice and just what I do; 6 oz of cheap as I can find 2stroke premix oil to one gallon of gas. Just, and I mean the absolute minute I hear and feel the engine calm down, move faster and sound better, I continue to use that gas as I are a cheap SOB. Then, and only then do I continue to use the same crapola 2 stroke oil mix but at 4 oz's to one gallon of gas.
Again, not in any way advise. Just what I do for my cast in dirt, 2 smoke bike engine, by a bare-foot guy who is afraid of his wife to the point she wears the shoes in the family.
6 oz of oil to a gallon of gas until your engine sounds and feels better. (you will know!) after that, 4 oz. of oil to a gallon.
I have yet to try Opti or the like so can't comment.
I gotta go. My wife needs the shoes,
I can't wait til it gets here.