The glycols are not listed, ignitable, corrosive, reactive or toxic (by TCLP) wastes. They will be separate from the oils. Pour off the oils from on top of the glycols and recycle both.
It stems from Prohibition and 3.2 beer (% alcohol by weight) becoming legal because of the popular opinion of the time that at 3.2 (which works out to 4.0% by volume) you couldn't get drunk. Kind of persists to today...why make it less than 4.0 (by volume) if you can't get drunk on it anyway...
I was told "back when" to throw a handful of salt in the fire when it was burning hot to help volatilize the creosote. There is a man-made "creosote sweeping log" you can burn periodically...don't know if it's compatible with a high-tech stove.
I changed the oil in the Buick to M1 AFE 0W-30 this fall for the winter. Looking for a quart for top off this week. Went to two Meijer and an Autozone near me, they didn't even have a shelf space for the 0W-30 version, just the 0W-20 and 0W-16. Checked Tractor Supply and Family Farm & Home...