Is there any truth to coating eggs with oil, placing them in the cartons upside down and then not storing them in the refrigerator - will make them last a few months???
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Conceivably, as the oil would block the pores in the egg shell and prevent evaporation/contamination. However, the oil would also eventually absorb in through the shell, so I would certainly avoid using mineral oil as some sites suggest, as it's toxic.
Having said that, I'm not sure of the logic behind storing them upside down.
answered Feb 9, 2013 at 9:00
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If you were to use food-grade mineral oil, you'd probably be okay, since it's specifically treated to be non-toxic. Feb 10, 2013 at 17:10
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If you dip the bottom half then flip, it'll trickle down over the top half? That's the only reasoning I can think of for storing them upsidown. Feb 11, 2013 at 2:20