Can I Mix 5W20 And 5W30 Motor Oil In My Car?

Can I mix 5w20 and 5w30 motor oil in my car? If that is a question of your mind, the one-word answer is yes, you can. Now,  the question is, how can you mix these two oils, as they are supposed to be two grades of oil.

However, we are here to explain to you all of these things and what will happen if they both get mixed, will there be any bad impact on the engine or not all the pros and cons. So, let’s read the entire content to get your answers. 

Can I Mix 5W20 And 5W30?

Well, as we have mentioned, you can mix 5W20 and 5W30 oil for a particular engine. Let’s be clear about when you can mix the two oils in a car.

As we can see, these two oils have a 5W grade which means they have the same lower temperature viscosity. By the way, if you don’t understand what viscosity is, viscosity means the thickness of the oil.

Well, there is no risk for the engine if anyone mixes two oils in a lower temperature; the engine won’t show any noticeable result.

Now, let’s know what will happen after mixing the 5W20 and 5W30 oils?

What Happens If You Mix 5W20 With 5W30

Basically, people mix multigrade oils to make their engine faster and smooth. But experts say that at the end of the day, in some cases mixing multi-graded oils can cause problems in the critical parts of the engine. So, it could hamper the functioning of these parts.

However, come to the positive side, it won’t give you any noticeable result if the engine supports the mixed oil. But it is safer not to use multi-graded oils in a car without knowing the fuel compatibility.

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Moreover, if you are still thinking, can I mix 5w20 and 5w30 motor oil? We would say, consult with the manual owners. If they encourage you to use mixed oil, then it is fully okay. 

Is Mixing 5W30 With 5W20 Bad

If you know what is the difference between 5w30 and 5w20, you can realize whether is it okay to mix 5W30 and 5W20 or not. We can presume that 5W20 has a comparatively low thickness compared to 5W30 oil in higher temperatures by evaluating the grade number.

So, the oil with low viscosity will probably boost the fuel economy. So, if you are in a comparatively hotter climate, the high viscosity oil is preferable to you. But if you are in the coldest climate, the lower viscosity oil is preferable for your car.

So, depending on the climate, if you mix 5W30  with 5W20 oil, the oil will be thicker than the normal thickness of 5W20. The way we select the grade of oil for a specific car, we must say that if you are in a comparatively hotter climate, the mix of these two oils might not be a problem for the engine. But if you are in a closer climate, the engine will probably face difficulty running due to the viscosity.

In a short sentence,  mixing 5W30 with 5W20 is not bad for the engine if it supports the oil, but if the engine doesn’t support it, there will be a problem. 

A Helpful Tutorial You May Need!

Frequently Asked Questions (FAQs)

Can you mix 5w20 and 5w30

Definitely, you can. You can mix the two grades, oils 5W20, and 5W30, together for your car. Although it seems these two oils are from different grades, both oils are the same viscosity grade. And both oils can operate in winter-based weather since we can address it as winter viscosity. So, yes, you can mix both of them because of their viscosity grades.

Can you mix 5W20 and 5W20 synthetic oil?

Yes. There is no risk of combing the two oils 5W20 and 5W20 synthetic oil. However, there is a question, how could it be? Well, synthetic oils are compatible with any conventional oil to get mixed. So, you can mix 5W20 synthetic oil with 5W20 oil as well as other regular oil. But the fact is, it won’t boost up the engine performance dramatically.

Final Verdict

To recapitulate, you may get the answer to your query, can I mix 5W20 and 5W30. You can mix the two viscosity motor oil in your car. But you should keep in mind what you’re going through. 

Although these oils have the same grade and are excellent for winter climate, there is a viscosity measurement. So, make a decision based on your driving condition and location. After all, there is no major problem in mixing up the above-mentioned two oil grades.

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D Conroy

Meet our senior writer and content manager of Automasterx. He has worked in several mechanical garages and mastered different vehicle diagnoses and parts repair. He never stops until finding out the ultimate solutions for any vehicle fault code. However, ensuring the only solid solutions for each vehicle malfunction is his core part of the duty, alongside analyzing fault codes and signals.

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