(AP) -- Phil DeVore pulls a folded piece of aluminum from a murky pond. The aluminum looks like a piece of siding that's blown off a building, but DeVore knows it's much more valuable than that. He slips a rubber band off the aluminum and unfolds it. He likes what he sees -- 50 or 60 glistening black leeches. They're your common ribbon leeches, Nephelopsis obscura to aquatic biologists.
After its initial use, cooking oil can be refrigerated or frozen and reused for another six hours of cooking (see References 2). Don't reuse cooking oil if it smells rancid or you can't heat it without smoke developing, as this indicates significant deterioration (see References 1 and 4).
Shelf Life Of Vegetable Oil. Every bottle of oil should have a âuse-byâ, âsell-byâ or some similar date labeled on it. In most cases itâs 2 to 3 years after the production date. Please remember that the mentioned date is just a rough estimate and it doesnât (by any means) mean that the oil will be bad after that date.