Accidentally Put Regular Oil Instead Synthetic: Is That Ok?!

The oil is considered to be the blood of all automobiles. The oil will give power to your vehicle, and it will also make all the other components work smoothly. The oil will take away that excess heat created by the moving of the internal parts of your vehicle. 

So is it okay if you will use regular oil instead of synthetic oil? Synthetic oil and regular oil have similar applications. That means that you can use regular oil after using synthetic oil.

It also had additives. These additives will clean out the harmful chemicals in your engine. But after a long time, you need to change your oil. 

Fluids on our vehicles are a mystery and a lot of people are asking if they can use regular oil instead of synthetic oil. Some car drivers want to know if it is really okay to use regular oil instead of synthetic oil. 

And with that, the question arises whether they can use regular oil instead of synthetic and what would happen then. So in this article, we’ll talk about what would happen if you used regular oil instead of synthetic. So without further ado, let us get started in knowing more about regular oil and synthetic oil. 

Accidentally Put Regular Oil Instead Synthetic

Is It Bad To Put Regular Oil Instead Of Synthetic?

Synthetic oil and regular oil have similar applications. That means that you can use regular oil after using synthetic oil. Many car drivers believe that if you start to use synthetic oil, you will go back to regular oil, but this is not true. 

Both of these oils might be different, but the differences are not much. The regular oil and the synthetic oil are made up of lubricants, and they will keep the engine’s performance smooth and steady. What would happen if you used regular oil instead of synthetic oil? 

If you change from synthetic oil to regular oil, it will not affect the vehicle’s well-being. The only difference that you will know is that there will be a change in the performance of your engine. The synthetic will be much better compared to the regular oil if you compare them in terms of quality. 

So with that, you will notice a change in the steady performance of your engine. The fact that the performance of your engine will decrease will make people think that a change to regular oil from synthetic oil will be impossible. Experts would prefer that you use and stick with a synthetic oil instead of downgrading. 

Thy synthetic oil will make your vehicle’s engine healthy, and it will also increase its usefulness. And so if you decide that you will change from synthetic oil to regular oil, there will be many things that you have to consider. It would also be recommended that you gradually change since introducing a new oil type to your engine. 

What Happens When You Use Regular Oil Instead Of Synthetic?

In this section, we will be discussing what would happen if you will use regular oil and not synthetic oil. 

1. Raw Manufacturing

Compared to a synthetic coil, the regular oil will be more distilled and more refined from the crude oil. Crude oil will be a naturally occurring liquid fossil fuel. So the companies are artificially preparing synthetic oil for the chemical compounds. 

The goal is to copy the properties of the natural oil. They will produce it in alignment with modern vehicles. 

2. No Cleanliness And Protection On The Engine 

The regular will move into the engine of the vehicle, and it will deteriorate very slowly. As a result, it will lead to the formation of sludge. 

It will also affect the performance of your vehicle’s engine and the lifespan of your vehicle. Synthetic oil has few impurities. 

It is also more sludge resistant. It will keep the engine of your vehicle clean. With that, your engine will be cleaner, and you will also have a more smooth operation.

3. Regular Oil Is Not A Good Choice For Driving With Extreme Temperatures

Your vehicle’s engine creates heat if you have a long ride. It will make the oil break down. Synthetic oil will work better under extreme conditions because it is made with accurate engineering. 

With that, it will resist heat quickly, and it will provide a long lifespan to your vehicle’s engine. The regular oil will take longer to heat up to the ideal viscosity in cold temperatures. In addition, it will not offer enough lubrication that is needed if you will start your vehicle.

4. An Increase In The Cost 

The mechanic can charge you about thirty dollars to forty-five dollars for a conventional oil change. The fully synthetic oil will cost you seventy dollars to one hundred dollars, depending on the vehicle. The full synthetic will cost you more, but the life of your engine will also increase. 

Regular oil will cost you somewhere between one hundred twenty dollars to one hundred eighty dollars. Regular oil is much more expensive. 

5. Lesser Oil Longevity

The synthetic oil will require you to change after just a short driving of about ten thousand miles to fifteen thousand miles. The regular oil will need to be changed after three thousand miles to five thousand miles. 

Is There Something You Should Do After Accidentally Using Regular Oil?

Even if you have accidentally used the wrong oil in your vehicle, you can still drive your vehicle with no problems, and you can wait until the next service. But experts do not recommend this because it can do damage to your engine. 

So instead, if you realize that you have accidentally used regular oil, get your vehicle checked by a mechanic to replace the oils so you can avoid further damages to your engine. 

Is It Ok To Put Regular Oil In After Synthetic?

Yes, you can put regular oil into your synthetic oil. It will not harm the quality of the vehicle or your engine. The vital thing is the performance. 

Your performance can improve with a switch back to synthetic oil. However, it’s recommended that you should not, but you can if you want to and if you have no other choice.


In summary, many people ask if they can put regular oil in their engines instead of synthetic oil. People also want to know what could happen if they will use regular oil instead of synthetic oil. 

So there’ll be some issue with this. But you can use regular oil. However, it will be more costly.

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Image credits – Canva

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My name is Hank, and I've been in the automotive industry for 27 years. I've been working in my own auto repair shop for the last 13 years, and now I want to help you here, on my blog. Let me know if you have any questions. Read more