Anywhere between 32:1 and 50:1 on the mix ratio. I prefer more oil in the mix at 32:1 or 36:1. I prefer more oil in the mix - better lubrication, better ring seal and better heat transfer away from the piston.
I will add that oils and mix ratios can cause for long discussions about which is best. Kind of like a "what is the best chain lube" discussion...
There is a japanese rating for 2 stroke oils. JASO FD is highest rating. And Jaso FC is similar in lubricating ability. I look for an oil that meets the JASO FD spec. And I look for labeling that says it "meets" the specification. Many oils will say "user where JASO FD recommended". These don't really meet the spec.
There are many good oils out there that will do "just fine" that don't have jaso rating. But I prefer to find one that does.. Just personal preference.
jeff