(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).
How long does oil last? The shelf life of oil depends on the best before date and how it is stored. Many people ask does oil go bad? Although they do tend to last longer than their best before dates, the answer to does oil go bad is most definitely yes! Oils are extracted from various plants - either from fruits as in olive, vegetables as in corn, seeds as in sunflower, or nuts as in peanut. So, how long does oil last? When properly stored, the shelf life of oil past its best before date is ... But remember that oil, like a lot of other condiments, usually has a best before date and not a use by date or an expiration date.