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Can You Mix 5W30 And 0W20? Discover The Right Oil Blend.

Published by Dustin Babich on

Mixing 5w30 and 0w20 is possible but not recommended due to potential viscosity differences. Using the correct oil for your vehicle is crucial for optimal performance and longevity.

Choosing the right type of oil for your car can be a daunting task, with the plethora of options available on the market. Two popular types of motor oil are 5w30 and 0w20. While both can be used in engines that require them, many vehicle owners wonder if they can be mixed.

In this article, we will discuss the compatibility of mixing 5w30 and 0w20 and the potential risks involved. We will also take a closer look at the differences between these two types of motor oil and highlight their unique features. By the end of this article, you will have a better understanding of which oil is best suited for your vehicle.

Understanding Engine Oil: The Basics

Engine oil is a vital fluid that keeps your car’s engine functioning smoothly. Api or sn rating is a measure that identifies the oil’s quality. The rating indicates the oil’s viscosity, meaning the oil’s ability to flow in different temperatures.

There are different types of engine oil, such as synthetic, conventional, and blends. Furthermore, each type has its grade, represented by numbers such as 0w20 or 5w30. Mixing 5w30 and 0w20 is not generally recommended because it can lead to engine damage.

Always check the manufacturer’s recommended oil type and viscosity before adding any oil to your engine. Understanding engine oil basics is essential in maintaining the longevity and performance of your car’s engine.

Understanding 5W30 And 0W20 Engine Oils

5w30 and 0w20 oils are two of the most common engine oils used in modern vehicles. The numbers preceding the “w” represent their viscosity grades. The “w” stands for winter, and the numbers represent the oil’s viscosity at low temperatures.

0w20 is thinner at low temperatures than 5w30. Thinner oils allow for easier engine start-up in colder climates, while thicker oils provide better engine protection at higher temperatures. 5w30 offers improved wear protection and better engine durability, while 0w20 provides improved fuel economy and lower emissions.

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Mixing these oils is not recommended, as it can affect the oil’s viscosity and reduce its performance. It’s important to consult the vehicle owner’s manual to determine the optimum oil type and viscosity for your engine.

Can You Mix 5W30 And 0W20?

Mixing 5w30 and 0w20 engine oils is generally not recommended. Doing so may cause significant consequences to your engine, such as decreased performance, increased wear, and reduced fuel efficiency. The additives in each type of oil work differently, meaning that when they are combined, their properties may alter.

However, there are specific cases in which pairing oils is acceptable. For instance, if you run out of the same type of oil while driving, adding a small amount of a compatible oil can help you reach the nearest gas station safely.

But regularly mixing incompatible oils is not recommended, so always try to stick to the oil blend that your car demands.

Find The Right Oil Blend For Your Vehicle

The recommended oil blend for your car’s make and model can be difficult to determine. It is best to consult with a certified mechanic who can advise you on the proper oil viscosity. Consider your driving conditions and habits as well.

Mixing 5w30 and 0w20 may seem like a good idea, but it can lead to engine damage and decreased performance. Stick to the manufacturer’s recommendations to ensure the longevity of your vehicle. Taking the time to choose the right oil blend can prevent costly repairs and keep your engine running smoothly.

Faqs About Mixing Different Engine Oils

Mixing engine oils can cause issues for your engine, especially if you mix oils of drastically different viscosities. Blending a 5w30 and 0w20 oil can lead to thinning of your oil and a decrease in its lubrication properties. Accidentally mixing different types of engine oils can cause clogging, corrosion, and damage to your engine’s mechanical parts.

Flushing and replacing the engine oil can cost between $100 and $150, depending on the type of car and the extent of the damage caused by mixing oils. It is always best to use the oil recommended in your car’s owner manual and not to mix different types without consulting a professional mechanic.

Frequently Asked Questions For Can You Mix 5W30 And 0W20

Can You Mix 5W30 And 0W20 Motor Oil?

Mixing the two motor oils is not recommended since it can affect the viscosity of the oil, which can lead to engine damage. This inconsistency can cause early wear on engine parts.

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What Happens If You Mix 5W30 With 0W20?

Mixing 5w30 with 0w20 motor oil will change the viscosity and may result in poorer fuel economy, reduced engine performance, increased engine wear, and higher repair costs.

Is It Bad To Use Different Types Of Motor Oil In Your Car?

Yes, using different motor oil types in your car can result in inconsistent viscosity, which can cause engine damage over time due to increased wear and tear on engine parts.

Can I Mix Synthetic And Conventional Oil?

Yes, you can mix synthetic and conventional motor oil, but it is not recommended since it can affect the oil’s viscosity and potentially harm the engine.

How Often Should I Change My Motor Oil?

It is recommended to change your motor oil every 7,500 miles or six months, whichever comes first. However, this can vary depending on the make and model of your vehicle and the type of driving you do.


It is not recommended to mix 5w30 and 0w20 since it can affect the performance of your engine. While some might argue that it won’t cause significant harm, it is better to stick to the type of oil recommended by your vehicle manufacturer to avoid any potential risks.

Engine oil is essential for the well-being of your engine, and using the right type can help it function efficiently and improve fuel efficiency. Keep in mind that mixing engine oil types can change its viscosity and affect its ability to lubricate and maintain the internal parts of the engine, leading to increased wear and tear over time.

So, it is always best to err on the side of caution and stick to one type of oil. Make sure to check your car’s manual and follow the recommended oil type and change schedule for optimal engine health.

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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