How to Store Deep Fryer Oil: Keeping It Fresh & Tasty!

Deep fryer oil is a vital component of every kitchen, especially for those who love deep-fried foods. Whether you are making French fries, onion rings, or chicken wings, deep fryer oil is a must-have item. However, if not stored properly, deep fryer oil can turn rancid and spoil quickly. Keeping deep fryer oil fresh and tasty is crucial for achieving perfectly crisped and delicious fried foods. Here are some tips on how to store deep fryer oil and keep it fresh and tasty.

Choose the Right Oil

The type of oil you choose for your deep fryer can make a big difference in its shelf life. Different oils have different smoke points and can handle different frying temperatures. But, what you need to consider is the oil’s stability and shelf life. The more stable the oil is, the longer it will last. The most stable oils are refined oils or high oleic oils, such as canola oil, peanut oil, sunflower oil, or grapeseed oil. Avoid using oils with low smoke points like extra virgin olive oil, or butter, as they can burn and break down more easily.

Filter the Oil

One of the most important steps in storing deep fryer oil is to make sure that it is free from food particles, crumbs or burnt pieces. Fried foods often leave sediment and debris behind, which can affect the quality of the oil. These particles can cause the oil to break down and go rancid more quickly. That’s why it’s important to filter the oil before and after each use. You can use a fine-mesh strainer, cheesecloth, or a deep-fryer filter cone to remove any food bits or impurities. Filtering keeps the oil fresh and clean, preventing off-flavors and smells from developing.

Store the Oil in a Cool, Dark Place

After filtering, you need to keep the oil in a cool, dark place to prevent it from getting exposed to light, air, and heat. These elements play a major role in the oil’s progress towards being rancid. When oil is exposed to light, it can oxidize more quickly, and develop an off-putting aroma and taste. Heat can break the oil down and speed up its deterioration. The best place to store deep fryer oil is in a dark, cool pantry or cupboard, away from the stove and windows. Keep the oil away from sunlight, heat sources, and moisture, so it stays fresh and tasty for longer.

Use Containers with Tight-Fitting Lids

Another important tip for keeping your deep fryer oil fresh is to store it in a container with a tightly fitting lid. This helps to keep air out, which can cause the oil to oxidize and develop off-flavors. The container should also be made of a material that is heat-resistant, such as glass or stainless steel. Avoid using plastic containers, as they can leach chemicals into the oil and affect its quality. Additionally, make sure the container is thoroughly dry before pouring in the oil to prevent moisture from spoiling it.

Label and Date the Oil Containers

It’s always a good idea to track the age of your deep fryer oil. By labeling and dating the containers, you can keep track of how many times the oil has been used and when it’s time to replace it. Write down the date when you first started using the oil, and mark it again after each use. Discard any outdated oil that has been sitting in storage for too long. This practice helps you maintain the freshness of the oil and avoid using expired or spoiled oil that can ruin the taste of your food.

Refrigerate Unused Oil

If you have leftover oil from your frying session, it’s best to refrigerate it rather than storing it at room temperature. The cold environment of the fridge significantly slows down the oil’s oxidation process and prolongs its shelf life. Once the oil is completely cooled, transfer it to an airtight, sealable container and place it in the fridge. The oil can remain refrigerated for up to a month without spoilage. However, if the oil looks cloudy or has a strong, unpleasant odor, discard it immediately.

When to Discard Deep Fryer Oil

Knowing when to discard deep fryer oil is essential for maintaining the quality and safety of the food you’re frying. Used oil can become rancid, off-flavored, and potentially harmful to consume. Here are a few signs that indicate it’s time to get rid of your deep fryer oil:

  • The oil has a strong, unpleasant odor or taste.
  • The oil has changed in color, from light to dark or cloudy.
  • The oil has developed foamy, greasy bubbles when heated.
  • You have used the oil repeatedly and it has exceeded its recommended lifespan. (Usually, 3-4 uses unless specified otherwise by the manufacturer.)


By following these simple tips, you can extend the life of your deep fryer oil and keep it fresh and tasty for longer. Choosing the right oil, filtering it properly, storing it in a cool, dark place, using containers with tight-fitting lids, and labeling it will go a long way to ensure that your deep-fried foods are always delicious.

Frequently Asked Questions

What is the best oil for deep frying?

The best oils for deep frying are those with a high smoke point and a neutral flavor profile. Some of the most commonly used oils for deep frying include canola, peanut, sunflower, safflower, and grapeseed oil.

How often should I change deep fryer oil?

You should change your deep fryer oil after 3-4 uses, or when it shows signs of spoilage or rancidity. If you use the oil for a longer time, it can affect the quality and flavor of your fried foods and pose health risks.

Can I mix different types of oil in my deep fryer?

While it is technically possible to combine two or more oils in your deep fryer, it is generally not recommended. Different oils have different smoke points, flavors, and nutritional profiles, and mixing them can lead to inconsistent results and potential health risks.

Can I reuse deep fryer oil?

Yes, you can reuse deep fryer oil up to 3-4 times, depending on the type of oil and the food you’re frying. However, it’s important to filter and store the oil properly to avoid contamination and spoilage. Ultimately, it’s best to discard the oil once it shows signs of deterioration or overuse.


  • BBC Good Food. (2021). How to store cooking oil. Retrieved from
  • Food Network. (2021). How to Store Oil. Retrieved from
  • My Recipes. (2021). How to Store Cooking Oils. Retrieved from

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