I'd like to know how long B100 would last as a solvent before it broke down and went rancid. I have a Harbor Freight parts washer that I just converted to a separate tank and filter setup. I'd love to fill the "new" tank with B100, but I worry that it would only last for a short amount of time before my investment went south. I might try some in a little carb cleaner tank to see how it holds up first.