I "cook" in the summer time taking advantage of the summer heat, I filter the oil down to 100microns and agitator mix with my methanol/KOH for a half hour in a cover container and let it settle for a couple of days. drain the glycerin off, use direct sunlight to evap the rest of the methanol off and filter thru a 1micron filter into a 55gallon drum. been using it in my trucks and now the 93MB. In short, time, warmth and gravity are your friends in this rare case

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1993 MB 300D 245K died.