How to clean used cooking oil


Cooking oil is an essential ingredient in our daily cooking routine, but what do you do with the leftover oil after frying or sautéing? Most people pour it down the drain, which can cause clogs and harm to the environment. However, did you know that you can transform your old cooking oil into fresh oil with just a few simple steps?

We will explore how to recycle your old cooking oil and turn it into fresh oil that can be used for future cooking. Not only does this save you money on buying new oils, but it also helps reduce waste and environmental damage. So let’s dive into these easy steps and learn how to transform old cooking oil into fresh ones!

Overview of how to clean used cooking oil:

If you are looking for a way to reuse your used cooking oil, cleaning it is an essential step. The easiest and most effective way to clean used cooking oil is by filtering it through a fine mesh strainer or cheesecloth. This will remove any impurities such as burnt bits of food or sediment that may have accumulated in the oil.

Another method involves using water and soap. Fill a container with hot water and add a few drops of dish soap. Pour the used cooking oil into the container and stir gently until the soap creates suds. Let the mixture sit for at least 30 minutes so that any impurities can settle to the bottom before carefully pouring the cleaned oil into another container.

10 ways how to clean used oil

1. Strain the cooking Oil:

The process of straining cooking oil is an essential step to ensure that your food is healthy and free from unwanted particles. Over time, cooking oil can accumulate impurities such as food debris, burnt pieces and other contaminants that make it unsuitable for reuse. Straining the oil removes these impurities and ensures that the oil remains fresh for future use.

To strain your cooking oil effectively, start by allowing it to cool down after use. Pour the cooled oil through a fine-mesh sieve or cheesecloth into a clean container. This will remove any large debris or particles present in the oil. You can also add activated charcoal filters to further purify the oil.

2. Use a Funnel and Coffee Filter:

To transform old cooking oil into fresh, you can use a funnel and coffee filter. First, place the funnel on top of a clean container. Then, put the coffee filter inside the funnel so that it covers the bottom of the funnel.

Next, carefully pour your old cooking oil through the coffee filter and into the container below. The coffee filter will trap any impurities or debris in the oil and leave you with fresher oil to reuse.

3. Freeze the cooking Oil:

One of the easiest ways to transform old oil into fresh fuel is by freezing it. Freezing the oil helps in separating the impurities from the oil. To freeze the oil, first, you need to pour it into a container and leave it in a freezer for at least 24 hours. Once frozen, remove the container from the freezer and let it thaw slightly.

4. Add Eggshells and Salt to cooking oil:

Adding eggshells and salt to your cooking oil is a simple trick that can transform old, used oil into fresh oil. To begin with, crush some eggshells and add them to the used cooking oil. Next, add some salt to the mixture and stir well.

After stirring thoroughly, allow the mixture to sit undisturbed for about an hour or two. During this time, the eggshells will settle at the bottom of your container along with any impurities they have absorbed from your old cooking oil. Finally, pour off the top layer of clean cooking oil into another container while leaving behind any sediment at the bottom including eggshells and other impurities.

5. Decant the cooking Oil:

To decant cooking oil, start by allowing it to cool completely before handling. Once cooled, pour the used oil through a filter or cheesecloth into a clean container. Make sure to discard any residue left in the filter after straining. Repeat this process until all of the old cooking oil has been decanted.

Decanting your cooking oils regularly can also help extend their lifespan and save you money in the long run by avoiding frequent purchases of new oils for your kitchen needs.

6. Use Bentonite Clay:

To use bentonite clay for this purpose, simply mix a small amount of the clay with warm water until it forms a smooth paste. Then add this paste to your old cooking oil and stir well. Let the mixture sit for about 30 minutes or longer so that the bentonite clay can work its magic.

Afterward, strain out any remaining bits of clay from the oil using a cheesecloth or coffee filter. Your once-used cooking oil will now be transformed into fresh, clean oil ready for use in your next recipe!

7. Use a Commercial Oil Filter Machine:

Step 1:

Use a commercial oil filter machine to remove impurities from the old oil. This machine is specifically designed to clean and filter used motor oil, making it reusable. It works by separating the contaminants, such as dirt and metal particles, from the oil through centrifugal force.

Step 2:

Add a specially formulated fuel additive to the filtered oil. This additive helps to rejuvenate the old oil, restoring its lubricating properties and increasing its energy efficiency. It also improves combustion performance and reduces emissions.

Step 3:

Store the fresh fuel in an appropriate container until you are ready to use it. Make sure that you label it clearly so that you don’t accidentally mix it up with your regular diesel or gasoline supply.

10. Dispose of Oil Properly

Proper disposal of old oil is a crucial step in maintaining the environment’s cleanliness and preventing pollution. Reckless disposal of used oil can lead to groundwater contamination, which can have severe consequences for both humans and wildlife. So, it’s essential to dispose of oil safely and responsibly.


We can see that old cooking oil need not go to waste. By following these easy steps, you can transform it into fresh cooking oil that is safe and healthy for consumption. Not only will this save you money, but it’s also an environmentally friendly solution to reduce waste and pollution. So next time you have leftover oil from frying or cooking, don’t throw it away – try out these simple techniques instead. Your wallet and the planet will thank you for it! Take action now and start transforming your old cooking oil into fresh today.

Leave a Comment