Oh man this thread... still consuming lives, oil threads are literally banned in some forums...
Haven't we all just agreed to run Red Armor or Power Blend yet? My equipment loves that stuff.
I will say this... I've now started creeping my oil mix back up to 32:1 (from 40:1), for that little extra lube in the bottom end. I'm noticing no real difference in smoke or oily exhaust, or fouled plugs. No need to retune either so far, in case anyone is wondering.
I'm also using up my cheap 2-smoke oil (the stuff that's supposedly usable in everything from a chainsaw to a snowmobile to a dirtbike) in my cheaper equipment, and to no surprise it works fine.
I have sworn off using marine oil in anything air-cooled, I can credit that to these discussions.
Carry on.