Question by danr555: How long and under what conditions can waste vegetable oil be stored prior to converting into bio-diesel?
I plan to accumulate waste vegetable oil from restaurants now to convert to bio-diesel at some later time. I was wondering if the cooking oil was stored too long a time would it degrade or spoil resutling in bad fuel?

Best answer:

Answer by Mike W
It depends on what you were planning to do to convert it to bio-diesel. In general the oil can be kept for a long time. Best to filter all solids out of it, and keep in an airtight container with only a very small air space, to reduce oxidation.

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