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Can I use 5w30 instead of 5w20 in my Toyota?

The short answer is: it depends. While you can use 5W30 motor oil in your Toyota, it is generally not recommended to do so unless specifically approved by the manufacturer. The recommended oil weight for your Toyota is likely 5W20, and using a different viscosity could potentially cause issues with engine performance and fuel efficiency.


Understanding Oil Viscosity Ratings


Motor oil viscosity is denoted by a number-letter combination, such as 5W20 or 5W30. The number before the "W" refers to the oil's viscosity, or thickness, at cold temperatures. The lower the number, the thinner the oil will be when the engine is cold. The number after the "W" refers to the oil's viscosity at normal operating temperatures.


Toyota typically recommends 5W20 oil for its vehicles, as this weight provides the right balance of fuel efficiency, engine protection, and cold-weather performance. Using a heavier 5W30 oil could result in increased engine drag, reduced fuel economy, and potentially slower oil flow during cold starts.


Factors to Consider


There are a few situations where using 5W30 oil in a Toyota may be acceptable:



  • High-mileage engines: Older engines with higher mileage may benefit from the slightly thicker 5W30 oil, as it can help reduce oil consumption and provide better lubrication for worn components.

  • Extreme weather conditions: In very hot or cold climates, 5W30 oil may provide better protection and performance than the recommended 5W20.

  • Manufacturer approval: Some Toyota models may specifically allow the use of 5W30 oil. Always check your owner's manual or with the dealer to ensure the heavier oil weight is approved for your vehicle.


Unless one of these factors applies to your Toyota, it's generally best to stick with the manufacturer-recommended 5W20 oil to maintain optimal engine performance and fuel efficiency.

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.



Should I use thicker oil in a 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.



Will it hurt my car if I use 5w30 instead of 5w20?


Now going back to you question: If you put a 5W30 instead of 5W20, you won't notice anything right away, but the wear and tear of the engine systems becomes faster. It will also exert extra force / load on the oil pump, as it was designed to work with the 5W20 oil.



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


Yes, you're OK. Any of the M1 5w30's would work perfectly in both of those engines. Another option is to use the 0w30 year round in both vehicles.



Will 5W 20 hurt a 0W-20 engine?


If SAE 0W-20 synthetic oil is not available, SAE 5W-20 conventional oil may be used. However, it must be replaced with SAE 0W-20 synthetic oil at the next oil change.



Can I put 5W-30 instead of 0W20 on my Subaru Outback?


Oil Type & Capacity for Subaru Outback
Like the Crosstrek, the oil for the Subaru Outback needs to be an API classification SN or ILSAC GF-5. Also like the Crosstrek, the Outback engine should be filled with 0W-20 synthetic oil. If synthetic oil isn't available, you can use either 5W-30 or 5W-40 conventional oil.



Is it bad if I use 5W-30 instead of 0W20?


While using 5W-30 instead of 0W-20 might not cause immediate catastrophic failure, it can lead to increased wear, reduced fuel efficiency, and potential long-term damage to the engine. It's best to stick with the oil viscosity recommended by the vehicle manufacturer for optimal performance and longevity.



What is a good substitute for 5w20 oil?


Therefore, a 0W would flow more easily than a 5W and could be an acceptable substitute. Thus, it is suitable to use a SAE 0W-20 as a replacement for SAE 5W-20 application.



Will using the wrong oil hurt my car?


Using the wrong type can wreak havoc on your engine, causing moving parts to wear prematurely due to inadequate lubrication. This can lead to costly repairs, replacement parts, and engine failure.



Can you use 5W-30 in a Toyota RAV4?


So, here's the rule of thumb: Toyota RAV4s with less than 75,000 miles should use oil with a viscosity of 0W-20 or 5W-20. Toyota RAV4s with more than 75,000 miles should use oil with a viscosity of 5W-30.


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.