I've been running Aeroshell Sport Plus 2 @ 40:1 for all my 2 cycle equipment. Saw a little smoke @ 32:1.
This oil is intended for ultralight and light sport aircraft. I figure if its good enough to fly with, and most aero 2 cycles are air cooled, then I can cut grass, weeds, blow leaves and such with it.
To sweeten the deal it is ACTUALLY CHEAPER than most of the "hero oils." Don't ask me why.
Its aviation grade. Its inexpensive for some reason. Shell brags about its ability to protect the engine internals from corrosion during storage. These are good enough reasons for me.
I think I paid $80 or so for a case of 12 QUARTS. I'll be using it for at least 10 more years.
A word of caution. It has a very weak green dye in it. It is the same color as the green dye they use in modern gas. When you mix it, it doesn't look like a 2 cycle mix. I bought a petroleum dye and add a drop for every quart I mix and it gets real dark and unmistakable. It helps prevent "mishaps."