Does Canola Oil Go Bad? Read This to Find Out

Does canola oil go bad? Unfortunately, it does. More so you will be able to tell when it gets rancid faster than you think.

There is nothing consumed that wouldn’t go bad after some time no matter the shelf life it may have, and canola is no different.

I understand why this might be perplexing because it is oil, and why should it go bad, right? To learn more about canola oil, why it goes bad, and how to ensure you preserve the oil properly, read this article to the end.

What Is Canola Oil?

Canola oil is obtained from a rapeseed variety that is minimal in erucic acid.

From the seed of some of several crops of the kingdom Plantae Brassicaceae, eatable and industrial forms are produced. It is also an oilseed crop created through plant crossbreeding.

SEE: Does Oil Evaporate – Causes and Solutions

Does Canola Oil Go Bad?

Yes, it does. Opened canola oil will usually keep for 1 year when stored in the pantry.

However, when not preserved appropriately will start to give off a bad smell.

SEE: Is Olive Oil Gluten-Free?

Does Canola Oil Go Bad After the End Date?

No, it does not. Unopened, it has a storability of 12 to 24 months and keeps value for at least a few months just after the printed date.

It has a shelf life of 6 to 12 months once opened, depending on how old it is and how it is stored.

Does Canola Oil Go Bad in the Heat?

There is no proof that the oil will go bad in the heat without the presence of molecules or mold.

Regardless of how unlikely mold or rot is to form, spoilage will occur after a while. The main deteriorative issue is that it easily goes rancid.

Rancidity occurs when oil molecules oxidize due to exposure to atmosphere, light, or heat.

SEE: Can You Substitute Canola Oil for Olive Oil?

Does Canola Oil Go Bad After Use?

No, it does not, if filtered and stored correctly. When used oil is not stored properly, it can spoil. However, it is preferable to utilize oil when using a deep fryer rather than a pan.

SEE: What Oil Does Popeyes Use For Its Foods?

How Long Does Unopened Canola Last?

An unopened bottle has a shelf life of around two years if properly stored. However, depending on storage conditions, the oil can go moldy in less time, so trying to check your oil before each use is critical.

Does Canola Oil Need to Be Refrigerated?

No, it cannot. You do not need to refrigerate. Rather, you should keep the oil in a cool, dark place. Most preferably, store the oil inside your pantry. The oil would last months without cooling if the bottle is sealed and away from heat.

Although you can also put them inside the fridge for a while still, keeping them in a cool-temp area is your best bet.

Is Canola Oil Genetically Modified?

Yes, it is. Most canola plants are genetic modifications (GMO) to improve agricultural quality and plant tolerance.

Its crops are grown to produce canola oil and canola meal, both of which are common in animal feed.

It can also be used as a diesel substitute and as part of products having plasticizers such as tires.

What Is the Shelf Life of Canola Oil?

You will have a good and pure canola oil for up to 24 months without any issue with spoilage. However, after this, you may see a change in color or smell.

Can Expired Canola Oil Make You Sick?

Yes, it may. Eating malodorous oil products may end up leaving an unpleasant taste in your mouth, but it may not at once make you sick.

However, contaminated oil can produce harmful free radicals, which cause long-term cellular damage and may contribute to the emergence of chronic diseases.

SEE: Do Almonds Go Bad? What You Should Know

How Long Is Canola Oil Good for After Frying?

Your canola oil would be good for 1-2 months after frying. However, ensure you always smell used oil before reusing it. This way, you will know first-hand when it has a hint of rancidity so you can throw it out.

How to Tell if Canola Oil Is Bad

You will get the following signs when oil has gone sour.

Bad smell

You can tell that your oil is bad when it gives off a rotten smell as canola doesn’t have a specific smell, only when heated does it sometimes smell remotely close to that of fish oil.

The oil color changes

The oil’s original color is golden and clear. When you notice a change from this to a deep yellow-golden-like color, your oil is going bad.

Mold or microbial growth begins to form in the container or on the cap

At this stage, your oil is bad-bad. The oil gets thicker and forms when you pour it. Also, you’d see some whitish particles on the cap of the bottle or container, and some, in the oil itself.

It tastes different and is offputting

Canola has a neutral, pleasant flavor, which explains why people prefer it in foods. For whatever reason you start to get a funny or rancid taste, it means the oil has gone bad, and you should thrash it.

What to Do With Expired Canola Oil

It is straightforward. You cannot reuse spoiled ones, so you must either throw them away or take them to a local waste center that accepts grease.

How to Store Canola Oil

To ensure you do not have to keep buying your oil every month, you need to learn the right ways in which to preserve them.

Store in a cool area

You should always keep canola oil in its original container, in a cool or dark cabinet. This way it is not exposed to heat, and it would last for 6 to 12 months without being used or touched.

Keep oil in the fridge

Another way to preserve is to refrigerate. It would even serve you longer as a refrigerated oil lasts for up to 9 months.

Preserve at room temperature 

The oil can be stored at a normal room temperature (20°C) for 12 months, though the aroma and heat will lessen in time.

SEE: Is Olive Oil Flammable?


Why is canola oil cloudy?

Cloudiness in canola and other oils is thought to be caused primarily by the presence of wax esters transmitted to the oil from plant tissues, as well as increased levels of saturated fatty acids.

Should you refrigerate canola oil?

Oils with high unsaturated fats or monounsaturated fat content, such as safflower, sunflower, canola, or olive are much more delicate and should be refrigerated if not stored in a cool temperature environment. Some argue that refrigerated olive oil is less useful because it becomes cloudy and hardens.

Which cooking oil has the longest shelf life?

Olive Oil. For cooking, salad dressings, and herbal cure formulations, this is your go-to. It can also be used for candles and emergency lighting.

Olive oil may be stored for longer than most other oils, and it will last the longest of these five oils if properly stored — about 24 months.

How many times can you reuse canola oil?

Reuse oil three or four times for breaded and battered foods. It’s fine to reuse oil for cleaner-frying items like potato chips at least eight times—and much longer, especially whether you’re restocking it with fresh oil.

Is it unhealthy to reuse cooking oil?

There is no evidence to corroborate if reusing oil is unhealthy. However, reusing frying oil without using a deep fryer, according to the dietitian, is exceedingly hazardous to your health.

Resued oil can increase cholesterol levels, create peroxides, damage organ cells, infect white blood cells, and cancer.


Canola oil is commonly used for frying, as the GMO plant oil is light and doesn’t give off any unpleasant smell. However, this doesn’t mean it wouldn’t go bad after a while, especially if it has passed its expiry tenure.

It’s also worth noting that the oil is chemically changed, which proves how pure and light it is once processed, making it one of the greatest choices.

The best way to ensure that oil is preserved is to store it in a cool-temp area, or the fridge. Additionally, you can have a bottle of oil for 24 months straight without it going bad.

Thank you for reading.

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