Cleaning out the pantry to prepare for the remodel and ran onto a bottle of expensive grapeseed oil and Olive oil with spices in it for dipping. Both unopened and kept in a cool dark environment for 10 years! Toss them or use them?
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Shelf life of Grapeseed and Olive Oil
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Jim Morris
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With oil, I would give it a sniff and taste test. If it is rancid, it should be obvious.
EDIT: I will go with the world renowned Troutman on this, and say throw it out. Unless you are participating in the "use expired rancid oil challenge" of course! Some foods, like honey, never really go bad if stored in a sealed container, even though they may crystalize.
Read this: https://www.insider.com/when-does-oi...opening-2018-1
About the only oil I have in my pantry that MIGHT go a full year before I use it up are some flavoring oils like Toasted Sesame oil. However, I also buy that in small containers, and not in gallon jugs.Last edited by jfmorris; November 9, 2021, 05:04 PM.
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According to the old Interweb, properly stored oils should last around 18 months or whenever the expiration date stamped on the container says. If you have 10 year old oil I'd toss it.
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I get this question a lot in the soap making groups I belong to.
Your nose is a good detector of rancidity. If the fat has little odor, but what odor there is is mild and sweet, it's fine. If the fat smells like old crayons, or has an obvious "fatty" or stale odor, or just plain stinks ... use it for a non-food purpose or discard it.Most people don't even use rancid fat for making soap, because the rancid odor persists in the finished soap.
Both fats are high in unsaturated fatty acids, so it's likely they're going to be rancid. Even though they've been stored under ideal conditions, ten years is a loooong time.
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