I run 32:1 for uniform measurement, the only time I have had oil run out of my saw mufflers is when I ran 800 on road at 32:1.
Usually you can tune32:1 to run clean, it's a debate on dirtbikes some guys will run40:1 when they see spooge but I have seen bikes with 50:1 spooge as well.
I ran a couple of tanks of GP7 in the new to me 661, and I must say there is barely any smell to this stuff lol, the saws seem to like it. There is some smoke upon startup but when running it seems clean even after idling for a bit
Those heated handle saws are indescribable, wish NY sold them regularly.
Sent from my non internal combustion device.