If there's coolant in it my oil then my engine is bad and it's combustion grade oil. Why would I put known contaminated oil in something I wasn't trying to sabotage?
Any clearance oil I've found lately has all been 20wt oils.
My reclaimed ICE grade oil comes from my wife's car and the pickup truck and has to be translucent, that's it. I clean off the drain plug area with my pressure washer and the oil goes into a catch pan I just cleaned with soap and water, allowed to dry.
Oil from unscrewing the oil filter goes into a dirty catch pan for combustion grade oil.
Combustion grade oil is any clearly contaminated oil, suspect contaminated oil, any unfiltered engines used oil, any opaque oil. Such as old gear oil out of diffs and gear boxes, used power steering fluid, used small engine and lawnmower oil, used diesel oil, burned up transmission fluid, ect.