Can You Mix 0W-20 And 5W-30? The Ultimate Guide.

Published by Dustin Babich on

No, it is not recommended to mix 0w-20 and 5w-30 motor oils as they have different viscosity ratings that can affect engine performance. Mixing oils can cause inconsistent engine lubrication and reduce the effectiveness of additives in the oils.

It is important to use the recommended oil viscosity for your vehicle as stated in the owner’s manual to avoid potential damage to the engine. When it comes to maintaining a vehicle, using the correct motor oil is crucial for optimal engine performance.

However, some people may wonder if it is okay to mix motor oils with different viscosity ratings, such as 0w-20 and 5w-30. In this article, we will explore the consequences of mixing these two oils and why it is not recommended. We will also provide some tips for choosing the right motor oil for your car to ensure smooth and efficient performance.

Understanding Motor Oil Viscosity

Understanding motor oil viscosity is crucial to maintaining your car’s health. The society of automotive engineers (sae) viscosity rating system measures an oil’s ability to flow. Lower viscosity oils, such as 0w-20, are thinner than higher viscosity oils, such as 5w-30.

This difference affects engine performance and fuel efficiency. Mixing 0w-20 and 5w-30 is generally not advised, as it can alter the oil’s viscosity properties. Always refer to your car’s owner manual to determine the recommended oil viscosity. By taking this precaution, you can ensure your vehicle performs well and avoid costly repairs.

Can You Mix 0W-20 And 5W-30 Motor Oils?

Mixing 0w-20 and 5w-30 motor oils is a subject that has divided opinions. There are different scenarios where mixing motor oils may occur, but is it recommended or safe to do so? The consequences of mixing the two motor oils can be severe and should be avoided if possible.

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Factors such as engine age and driving conditions also play a role in the effects of mixing motor oils. If you must mix motor oils, it’s best to do it in small quantities and with a similar viscosity rating. Before mixing motor oils, always consult your car’s manual and be aware of the possible outcomes.

How To Properly Mix 0W-20 And 5W-30 Motor Oils

Mixing motor oils can be a confusing topic for many drivers. If you’re thinking about mixing 0w-20 and 5w-30 oils, there are a few best practices to follow. Firstly, measure and calculate the total viscosity of the mixed oil to ensure it falls within the recommended range for your engine.

Secondly, understand that sometimes it can actually be beneficial to mix oils – such as if you need to top-up your oil and don’t have the exact same one on hand. Following these guidelines will ensure that you can safely use mixed motor oils without damaging your engine.

Frequently Asked Questions Of Can You Mix 0W-20 And 5W-30

Can You Mix 0W-20 And 5W-30 Motor Oils?

Yes, you can mix 0w-20 and 5w-30 motor oils but it’s not recommended. Mixing different viscosity oils can affect the overall performance of the engine. It’s better to stick to the recommended oil viscosity by the manufacturer.

Will Mixing 0W-20 And 5W-30 Damage My Engine?

Mixing 0w-20 and 5w-30 motor oils won’t necessarily damage your engine, but it can affect the oil’s efficiency and the engine’s performance. It’s better to stick to the recommended oil for your vehicle to avoid any issues.

What Happens If I Accidentally Mix 0W-20 And 5W-30 Oils?

If you accidentally mix 0w-20 and 5w-30 oils, it’s not the end of the world. However, it’s better not to do it in the first place, because it can affect the overall performance of your engine. If you’ve already mixed them, you can keep using the oil until your next oil change.

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Is It Better To Stick To One Type Of Motor Oil?

Yes, it’s better to stick to one type of motor oil to maintain the recommended viscosity. Mixing different types can affect the overall performance and efficiency of your engine. You can refer to your vehicle’s manual to determine the recommended motor oil for your car.

How Often Should I Change My Motor Oil?

The frequency of oil changes depends on several factors, including the car’s make and model, driving conditions, and mileage. Most manufacturers recommend changing oil every 5,000 to 7,500 miles. However, it’s best to check your car’s manual for specific oil change intervals.


As we wrap up this discussion, it’s clear that mixing 0w-20 and 5w-30 can cause some concerns for your vehicle. While it might be tempting to mix the oils since they’re both from the same manufacturer, it might not be suitable for your engine, and it could lead to faster wear and tear.

It’s essential to follow the manufacturer’s recommendation when it comes to oil types and viscosity levels. It’s also crucial to note that the engine’s age and usage might require different oil viscosity to run efficiently. Mixing them without necessary research might cause significant harm to the engine.

Always consult with a mechanic before trying to mix different oils and grades. By doing so, you can keep your vehicle running smoothly, efficiently, and extend its life while avoiding any costly repairs.

Dustin Babich

Dustin Babich

Dustin Babich

As the passionate author behind, Dustin Babich is a knowledgeable expert in all things automotive. With a deep understanding of car tools, equipment, engines, and troubleshooting techniques, Dustin Babich shares invaluable insights, practical tips, and effective solutions to empower readers in overcoming car-related challenges.


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