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Can you run 5W30 instead of 5w20?

The short answer is that it is generally not recommended to use 5W30 motor oil instead of the recommended 5W20 oil for your vehicle. While it may be possible in some cases, there are important considerations to keep in mind.


Understanding Motor Oil Viscosity


Motor oil viscosity is a measure of the oil's resistance to flow. The "W" in the oil designation stands for "winter," and the number before it indicates the oil's viscosity at low temperatures. The number after the "W" represents the oil's viscosity at higher operating temperatures.


A 5W20 oil is designed to have a lower viscosity at cold temperatures, making it easier to circulate through the engine during startup. This helps improve fuel efficiency and reduce wear on engine components. In contrast, a 5W30 oil has a slightly higher viscosity, which may not provide the same level of cold-weather protection and could result in reduced fuel economy.


Potential Consequences of Using 5W30 Instead of 5W20



  • Reduced Fuel Efficiency: The higher viscosity of 5W30 oil may cause increased resistance within the engine, leading to higher fuel consumption and reduced fuel efficiency.

  • Increased Engine Wear: The thicker 5W30 oil may not circulate as easily, particularly during cold starts, which could result in increased wear on engine components over time.

  • Potential Engine Damage: In some cases, using a higher viscosity oil than recommended by the manufacturer could lead to increased stress on the engine, potentially causing damage to sensitive components.


It's important to note that the specific recommendations for motor oil viscosity are based on the engine design and the manufacturer's specifications. Using a different viscosity oil than recommended could void the vehicle's warranty and may not provide the same level of protection and performance.


When Can You Use 5W30 Instead of 5W20?


In some limited cases, it may be possible to use 5W30 oil instead of 5W20, but this should only be done with caution and after consulting the vehicle's owner's manual or a qualified mechanic. Factors to consider include the age and condition of the engine, the climate and driving conditions, and any specific recommendations from the manufacturer.


If you do decide to use 5W30 oil instead of 5W20, it's important to monitor the engine's performance and oil consumption closely and to change the oil at the recommended intervals to ensure the engine's longevity and optimal performance.

What will happen if I put 5w30 instead of 5w20?


The problem is that while 5w20 to 5w30 is not a huge difference, when 30 weight is the boundary for the particular engine, going thinner causes damage. It's just like going thicker in subzero temps when the engine isn't designed for it causes damage.



Can I use 5w30 instead of 5w20 in my Ford Edge?


You'll be fine. Don't worry about the difference between 5w20 and 5w30. I accidentally put 5W-30 oil in my car when it takes 5W-20.



Can I use 5w30 instead of 5w20 for high mileage car?


If 5w20 is not available there is absolutely nothing wrong in using 5w30. And for a high mileage car 5w30 will offer better protection depending on the condition of the engine. Even some manufacturers that recommend 5w20 still recommend 5w30 if car is old and will be driven in temperate regions most of the times.



Can you mix 5w30 and 5w20?


In nearly all cases, you can use whatever motor oil is available as long as it's clean and from a sealed container. Mixing oils is virtually always better than running on low oil.



Can you mix 5W30 and 5w20?


In nearly all cases, you can use whatever motor oil is available as long as it's clean and from a sealed container. Mixing oils is virtually always better than running on low oil.



Is it OK to use thicker oil in high mileage engine?


Using a thicker oil or one with a higher viscosity may also be helpful once your car reaches 100,000 miles. Or you can opt for oil additives that help stop leaks.



Can you put 5W30 in a 5w20 engine in emergency?


In an emergency, you may have to substitute one for the other, but it's always best to follow your manufacturer's recommendations.



What can I substitute 5w20 with?


You can easily substitute 5w20 with 0w20, just like M1 says. According to them, you'll still have warranty protection. All the 0 means is it can start easier in the cold then 5w.



Can I use 5W-30 instead of 5w20 in my Hyundai?


Either one will work. Some like a little thicker oil with higher mileage as tolerances have gotten larger.



Can you mix 5W30 and 5W20?


In nearly all cases, you can use whatever motor oil is available as long as it's clean and from a sealed container. Mixing oils is virtually always better than running on low oil.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.