There are many, many people wiser than I who are very particular about the mix oil they use for their 2 smoke engines.
I am not discriminating.
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I'll run anything that claims it will work for 2 stroke lubrication. Never burned one up for lack of lube. in 50 years.
I HAVE fouled many plugs using too much oil, though.
IMO tolerances are so poor in a china motor that any sauce will do the job.
if I were racing??? then I'd probably find a way to run the Opti2 at 100:1.
I'm a genuine, ingrained hack.
Buy a jug of proper oil and mix the two together...
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run it at 40:1
Best
rc