Hello ,
My first post, I could not resist the 2 stroke oil topic any longer.
I use Bel Ray H1R ester synthetic in all my air cooled 2 strokes, and it leaves no residues and no piston ring sticking at all.
Motul 800 off road is very similar (ester)and also gives fantastic power and clean pistons.
Both are SAE 40 weight so not the best for injector type 2 strokes. My local motorcycle shops carry these, so they are easy to get , no need to order and pay shipping fees etc...