Absolutely as to daily tuning & the cause an effect issue . I set my low speed to ensure crisp response , then tune the high speed within the cut to allow maximum rpm & back it off a quarter turn or so . The idle speed once warmed up to just before clutch engagement , this usually provides sufficient rpm for a cold idle start up !
I actually bought some of their same labelled bar oil it was $12 a gallon at the time , fine product !
Any FD oil is great for chainsaw use. I'd rather run that stuff than Saber to be honest.
Here's a thread from a guy who has tested 2 stroke oils for the Department of Defense in 2 stroke UAV engines. Note the thread title: https://www.flyinggiants.com/forums/showthread.php?t=57253 What do you think of the pics there. He says there is no way it was running rich either.
If legit.
#303 right on the certified list dated 1 Nov 2022. 
In the first place it's pretty apparent that those pics didn't come from a motor that was running rich. A rich mixture will typically wash the piston clean or partially clean. That motor was ran on the lean side and it shows a buildup of sulfated ash indicative of running a low ash type oil at constant rpm.
Replying to your post you tagged me in at 125pm, bud.
I'm an old motocrosser from the 60's and 70's and I flat love the smell of good old Castrol R! Bean oil was all I'd ever run in my Maico's and CZ's. Just thinking of it now makes me long for a whiff!
Benol smells equally as good , case of Labatt's ?
Bean oils just smell like a deep fat frier to me and give me the worse headache
I've ran that before also and you're right it does have a great smell. I even have a small bottle sitt'n on a shelf in my garage. Been there for years, I just look at it with nostalgic eyes.
