the Stihl sliver bottle stuff is a bio mixI've been 100% canola for 4-5 years - just buy it in the baking isle at the grocery store (bonus: no sales tax...). No problems. Maybe a little more fine dust stays under the clutch cover?
I only use the 385 a few times a year (don't do a lot of removals...) so it sits. Sometimes empty, sometimes not. I haven't seen any ill effect from that.
The last paragraph in the OP's article says:
One final note: This article recommends using vegetable oil to replace chain oil in chainsaws. However, this does NOT mean replacing “mix” oil which is used for the gas mix. For mix oil, you must use the petroleum-based 2-stroke mix oil recommended by the chain saw manufacturer.
There are bio-based 2 stroke oils (It says bio based...petro is bio based...). I haven't tried, but these guys were at the TCIA show last fall: https://www.nvearth.com/2-cycle.