Been running Torco GP7 for a few gallons and the 661 and 7900 like it lol, I have not ran the 441 in a while sadly lol.
Maxima K2 or Klotz R50 are my top 2..... in a few months we will see if Torco moves up to top spot.
Most of these oils are overkill for saws even when ported IMO, which I don't mind.
My next test on oils is going to be 927 Castor at a lower ratio ( 40:1 or 45:1) I ussally run 32:1 but there is some debate about 927 leaving deposits but when I was running it the 441 I had no issues.
I have some Motul 800 Road Racing that may be ran at those ratios as well due to that oil being pretty overkill even for dirtbikes, Road bikes have longer extended RPM pulls.