Re: Don't use marine 2 stroke oil in your chainsaw!!
It is conservative to say do not use a Marine 2 cycle oil in an aircooled 2 cycle engine; since many folks will just buy the cheapest marine 2 cycle oil; and not a premium type.
Thus it protects the bulk of folks and one does not have to explain why or provide exceptions; that folks can get confused about.
There are folks who actually use oil ratios of 1:100 in engines that say 1:50 because they use better oils. I do this with a tiny generator; it pollutes less, creates less smoke; uses less oil and I do it with marine 2 cycle in an air cooled engine; but it is a premium synthetic oil.
Bending the rules and doing acceptions voids warranties.