How long does grape seed oil last?
Feb 20, 2021

Does Grape Seed Oil Go Bad?

here’s this half-open bottle of grape seed oil in your pantry. And it sits there for who knows how long. You switched to a different cooking oil some time ago and forgot about this one. Now you want to finish the bottle, but you notice that it’s past the date on the label. Does grape seed oil go bad?

Well, the answer to this question is a bit more complicated than a simple yes or no. To answer it for your specific situation, you need to learn a bit about storage, shelf life, and going bad of grape seed oil. In this article, we go through all of those topics. If you prefer to avoid waste, but at the same time you don’t want to make anyone sick from eating spoiled oil, read on.

When properly stored, an unopened bottle of grape seed oil will have a shelf life of up to three months after the printed expiration date. If the unopened bottle is refrigerated, the shelf life is extended to up to six months past the expiration date.

Of course, once the bottle is opened, the exposure to air, heat and light will begin to oxidize the oil and the shelf life at room temperature will reduce to three months past the date of opening. Refrigerated, grape seed oil will last about six months past the date it was opened.

Keep in mind that exposure to light, heat and oxygen can increase the rate at which grape seed oil spoils, so it’s always best to check the oil for signs of spoilage before using.

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How To Store Grape Seed Oil?

Storing grape seed (or grapeseed) oil is no different from storing other oils, like sesame oil or peanut. That means you should keep it in a cold and dark place, away from sources of light and heat. The ideal storage temperature is between 68 to 77 Fahrenheit (or 20 to 25 Celcius). That means you can store the oil in either the pantry or the kitchen. Just make sure it’s away from the oven, as frequent temperature fluctuations may cause its quality to degrade faster.

Once you open the bottle, remember to keep it sealed tightly when not in use. The rest of the guidelines don't change. You can also refrigerate this oil to extend its shelf life slightly. However, refrigeration is totally optional.

Unlike other oils, (e.g., canola oil), grapeseed oil doesn’t get cloudy when refrigerated. That makes it a perfect oil for many dressings, homemade mayo, and other foods that require refrigeration.

How Long Does Grapeseed Oil Last

The shelf life of grapeseed oil is not that different from other cooking oils. As usual, the bottle comes with a best-by date on the label. That date is more about freshness than food safety. If you adhere to the storage guidelines I outlined earlier, you can expect the oil to last in excellent quality at least a few months past that date.

Once you open the bottle, the oil gets access to “fresh” oxygen, and the process of oxidation speeds up. Oxidation results in the oil going rancid. However, that’s a slow process, especially if you open the bottle rarely and close it tightly as soon as you’re done. Nevertheless, expect the oil to retain freshness for about half a year in the pantry and a year if refrigerated. Please note that those are rough estimates and your specific situation might be different.

Please note that the periods above are for best quality only.

Grape seed oil (unopened)Best by + 3 – 6 monthsBest by + 6 – 12 months
Grape seed oil (opened)6 months1 year

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How To Tell If Grapeseed Oil Is Bad

While oils usually do not mold or rot in the traditional sense, please keep an eye out for any signs of mold, discolorations, off smell, or change in taste. If any of these occur, discard the oil.

What’s much more likely to happen is that the oil goes rancid. Rancidity occurs when the oil is oxidized, which happens due to exposure to light, heat, or oxygen for extended periods. While rancid oils aren’t necessarily unsafe to eat, their nutritional value is diminished. And they sure as hell don’t taste good.

If the grape seed oil develops an unpleasant odor and taste, it most likely is rancid. Be sure to give the oil a good sniff before using to check for rancidity. If everything with the oil seems to be okay, and you don’t store it for much longer than recommended, feel free to use it.


  1. How long does grapeseed oil last once opened? The precise answer depends to a large extent on storage conditions - to maximize the shelf life of opened grapeseed oil, refrigerate after opening.

  2. How long does an opened bottle of grapeseed oil last in the refrigerator? Opened grapeseed oil will usually keep for about 12 months when stored in the refrigerator.

  3. Refrigeration may cause the grapeseed oil to become cloudy and solidify, but this will not affect the quality or flavor — once the oil is brought back to room temperature, it will return to its normal consistency and color.

  4. Is an opened bottle of grapeseed oil safe after the Use By or Best By date? Yes: "Best By," "Best if Used By," and "Use By" dates on commercially packaged foods sold in the United States represent the manufacturer's estimate of how long the product will remain at peak quality - in most cases, the opened bottle of grapeseed oil will still be safe to consume after that date, as long as it has been stored properly.

  5. How can you tell if an opened bottle of grapeseed oil has gone bad? To determine if oil is still suitable for use, smell and taste it: If the oil has developed an off odor, flavor or appearance, it should be discarded for quality purposes.

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