Since this is now an oil thread....
I used to run whatever I could get mixed
@50:1 with standard pump gas.... then I moved and stihl gray bottle was all that was locally available so I used that for about a year (
@40:1), then I learned online that the vast majority of builders & yackers dislike it, so I switched to red armor.
On the few saws I've opened up, the red armor looks to be doing noticeably better, way more residual oil in the guts and very little carbon.
Having said that, I've never burned up a saw regardless of what oil or mix ratio I was running, and I've burned hundreds of gallons of gas in saws in the last 30 years.
Just sharing my experience here, I don't pretend to "know" anything about two stroke oils.