cold comfort farm,
Hi, where are you? I am in Lincolnshire. BTW, I am not Oliver - I just own a 90 (and about a dozen other Olivers)
I just read the link at the top of this thread (the part re glycol, and the way it leads to engine failure). Wondered how good it might be as a flocculant in this application.
Link says as little as 0.4% coolant contamination, so presumably 0.2% shoud be enough to do something, given time. i would think1% and lower might give an indication of likely assistance in coagulating the solids. It might just make a mess, like it does of the engine! It might need heat to speed up the effects.
It was just that the mode of engine failure seemed to indicate some possibilities for cleaning up used engine oil - as long as all the glycol is removed if anyone thinks it looks good enough to use again as a lubricant! There are, of course, other similar compounds to ethylene glycol that might work as well, or better, and not be harmful. It might be a way of using up old antifreeze as well as old oil!!!
Regards, RAB