Can Synthetic Engine Oil Mix with Regular Motor Oil?

We often use different types of oils in engines or vehicles. For example, regular motor oil and synthetic oils are two different types of oil. Moreover, synthetic engine oils have some classes. Generally, mixing two other oils is not recommended.

So, you might be confused about whether you can mix synthetic engine oil mix with regular motor oil or not.

Synthetic oil and regular motor oil have different ingredients. So, you have to know whether mixing them will be safe. Moreover, learning about the benefits and drawbacks of combining these two oils is also essential.

Can Synthetic Engine Oil Mix With Regular Motor Oil?

You can mix synthetic engine oil with regular motor oil. Generally, synthetic engine oil can be mixed with other types of oils. Because synthetic oil is pretty compatible with other oils. Moreover, the base oil in synthetic engine oil and regular motor oil is the same. So, they can be mixed.

However, synthetic engine oil is engineered oil made for better performance. This oil has fewer impurities than other regular oils. The performance of synthetic oil is one of the best. On the other hand, regular motor oil might have impurities.

But regular motor oil is pretty efficient for engines with a more straightforward design. Generally, the purposes of synthetic engine oil and regular motor oil are pretty similar. So, you can use one of these oils instead of the other one.

Even you can mix these two types of oils. Generally, some changes might arise when you mix synthetic engine oil with motor oil. But this doesn’t mean that the mixed oil will harm the engine dangerously.

Mixing these two oils is safe occasionally. You can mix them if you don’t have other choices. But if you continuously do this, the engine might face the effects. For example, the performance of synthetic oil might get reduced.

Because motor oil might have impurities that will make the synthetic oil diluted. Moreover, the properties of synthetic oil might get reduced. But the mixture of oil will work for the time being.

Synthetic oils also have different types. But most of them are compatible with other oils. For example, if you mix synthetic oil with motor oil, these two oils will be compatible. So, the engine will not face any significant problem.

Though mixing oils is not recommended. But if you need to mix motor oil and synthetic oil, you can do it. Some people mix them to reduce the cost. But you have to remember that mixing oil should be temporary. You should not use mixed oil for a long time.

Does it hurt to mix synthetic oil with regular oil?

No, it doesn’t hurt to mix synthetic oil with regular motor oil. Because these two oils are compatible with each other. Moreover, mixing synthetic oil with regular oil will not create any dangerous situation. So, combining them is pretty safe.

You can mix these two oils if you need them in an emergency. But mixing them can reduce the performance of the engine.

Because synthetic oil is purer than regular motor oil. When you add regular motor oil with synthetic oil, the properties of the synthetic oil will get reduced.

For example, the mixed oil will provide less lubrication and corrosion resistance. Moreover, the synthetic oil will be diluted. You should not mix regular motor oil with synthetic oil because synthetic oil is pretty costly.

Mixing synthetic oil with regular motor oil will create some circumstances. But it will not hurt to mix them. You can mix them without the fear of danger.

Four reasons why you can mix synthetic engine oil with regular motor oil

Now that you know you can mix synthetic engine oil with regular motor oil, you might want to know the reasons. So, let’s see why you can combine these two oils.

Same base oil:

Synthetic engine oil and regular motor oil have the same base oil. Generally, synthetic engine oil is engineered with other additives for better performance. Besides, motor oil also has other additives.

But the base oil is the same for these two types of oils. So, they will not create any significant problem when you mix them.

Compatible with each other:

Synthetic engine oil and regular motor oil are compatible with each other. You might know that most synthetic oils are compatible with different oils. So, when you mix regular motor oil with synthetic oil, the oil might get diluted.

But the oils will be appropriately mixed and work compatibly.

Less risk:

You might think that different oils might create a dangerous situation if you mix them. But synthetic engine oil and regular motor oil are not dangerous. Even when you mix them, they will not react vigorously. So, you can mix them.

Less costly:

The mixture of synthetic engine oil and motor oil is less costly. Generally, pure synthetic or fully synthetic oil is expensive. So, when you mix motor oil with it, the cost reduces. So, you can mix them if you want to reduce the cost.

What happens when you mix synthetic oil with regular motor oil?

You can mix synthetic oil with regular motor oil. But this doesn’t mean that there will be no problem.

Some problems might arise when you mix synthetic oil with regular motor oil. So, let’s see what will happen when you mix synthetic oil with regular motor oil.

Oil gets diluted:

When you mix synthetic oil with regular motor oil, the synthetic oil will get diluted. Generally, synthetic oil is pure and costly. So, after mixing regular motor oil, the synthetic oil gets diluted.

Performance get reduced:

After diluting the oil, the oil’s performance is also reduced. Generally, synthetic oil performs better. So, when you mix regular motor oil with it, the performance will not be like before.

The overall performance of the engine will also get affected. If you use the mixture continuously, significant problems will arise in the engine.

Properties get reduced:

If you mix synthetic oil with regular motor oil, the properties of the synthetic oil get reduced. For example, synthetic oil has excellent lubricating properties. But when the regular motor oil gets less lubricating.

Moreover, the corrosion resistance gets reduced after adding the regular motor oil. The properties will degrade more if you use the mixed oil regularly in the engine.

Can you mix high mileage synthetic oil with regular oil?

Yes, you can mix high mileage synthetic oil with regular oil. There is no risk of mixing high mileage synthetic oil with regular oil. Because high mileage synthetic oil is pretty compatible with other regular oils.

Sometimes, you might think about whether it will be safe to mix high mileage synthetic oil with regular oil or not. But incorporating these oils will not create any dangerous situations.

The performance of the high mileage oil will get reduced. The high mileage oil will not be as high mileage oil.

The mixture will be mid-grade or ordinary engine oil. Otherwise, mixing will not create problems immediately. That’s why you can mix high synthetic oil with regular oil.

So, you can mix high mileage synthetic oil with regular oil if you need to mix it.

What if you have to mix oil types? Which ones can you mix?

If you have to mix oil types, you can mix synthetic oils with other types of oils. Because synthetic oils are compatible with other oils. For example, synthetic oils can be mixed with regular motor oil, conventional oil, mineral oil, etc.

Synthetic oils can be of many types. For example, full synthetic oil, semi-synthetic oil, synthetic blend oil, etc., synthetic oils can be mixed with other types of oil.

Conventional oils can also be of different types. For example, motor oil, mineral oil, conventional oil, etc., can be mixed with synthetic oils, and synthetic oils will not create any risk if mixed with these oils.

Generally, mixing oils is not recommended. But synthetic oils are made of base oils. So, synthetic oils are compatible. That’s why you can mix synthetic oil with other regular oils.

Final Thoughts

Synthetic engine oil and regular motor oil can be mixed. Because these two oils are compatible with each other. Moreover, mixed oil will not harm the engine immediately. Mixed oil can gradually create problems if you use the mixture continuously. It would be best if you don’t mix them.