IIRC, the oil does tend to absorb and entrap some of the refrigerant, which isn't that bad until you go to burn it. Many old refrigerants produce phosgene gas when burned, very nasty stuff. You might be able to centrifuge it and get both the metals and freon out, but I'd just pass on it.

 

thanks.

i think i will pass on it. i'll get the kids busy using it for wood deck treatment on my trailer or have them use it to treat posts .

i dont want to even gamble with the lowly isuzu being damaged by that stuff.