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Can I put 5W-20 in a Toyota Corolla?

The short answer is no, you should not put 5W-20 motor oil in a Toyota Corolla. The recommended oil weight for a Toyota Corolla is 0W-20 or 5W-30. Using the wrong oil weight can potentially cause engine damage and negatively impact the vehicle's performance and fuel efficiency.


Understanding Oil Weights and Recommendations


Motor oil is classified by its viscosity, or thickness, which is denoted by a number and letter combination. The first number (e.g., 5W, 0W) indicates the oil's cold weather performance, while the second number (e.g., 20, 30) represents the oil's hot weather performance.


Toyota Corollas are designed to use 0W-20 or 5W-30 motor oil, as these weights provide the optimal lubrication and protection for the engine under a wide range of operating conditions. Using a lower viscosity oil, such as 5W-20, can lead to increased oil consumption, reduced fuel efficiency, and potentially cause engine wear over time.


Risks of Using the Wrong Oil Weight



  • Increased Engine Wear: Lower viscosity oils like 5W-20 may not provide sufficient lubrication for the engine's moving parts, leading to increased friction and wear over time.

  • Reduced Fuel Efficiency: The thinner 5W-20 oil may not create an adequate oil film, resulting in increased engine drag and reduced fuel economy.

  • Oil Consumption Issues: The lower viscosity of 5W-20 oil can cause it to burn off more quickly, leading to the need for more frequent oil changes and top-ups.

  • Potential Engine Damage: In extreme cases, using the wrong oil weight can cause serious engine problems, such as bearing wear, oil leaks, and even engine failure.


It's important to always refer to your Toyota Corolla's owner's manual or consult with a qualified mechanic to determine the recommended oil weight for your specific vehicle. Adhering to the manufacturer's guidelines is crucial for maintaining your car's performance, fuel efficiency, and long-term reliability.

What vehicles take 5W20?


Mobil 1™ 5W-20 is recommended by ExxonMobil for all types of modern gasoline-powered vehicles, including high-performance turbocharged, supercharged, multi-valve fuel injected engines found in passenger cars, SUVs, light vans and light trucks.



Will the wrong oil damage my engine?


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 I use 5W-20 in my Toyota Corolla?


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.



Which engine oil is best for a Toyota Corolla?


For a 2020 Toyota Corolla, the recommended engine oil is 0W-20 full synthetic oil. This viscosity provides optimal performance and fuel efficiency, especially in varying temperature conditions. Always refer to your owner's manual for the most accurate information regarding oil specifications and maintenance guidelines.



Will it hurt to mix 5W20 with 5W30?


Mixing 5W20 oil with 5W30 oil is not recommended, as it can cause several problems for your engine. The main reason is that 5W20 and 5W30 have different viscosity ratings, which means they have different thickness and flow characteristics at different temperatures.



Is 5W-20 good for my car?


In colder places, 5W20 is good because it flows better at lower temperatures. In warmer climates, 5W30 might be the better choice because of its extra thickness at high temperatures.



Can 0w20 be used in hot weather?


0W-20, for example, is rated at 104°F (40°C) for external temperatures, and 212°F (100°C) for internal engine temperatures. So, the 0W rating of most oils, including ENEOS, is within operational parameters of warmer climates like Hawaii, Phoenix, and Las Vegas.



What happens if I put 0w20 instead of 5W20?


The 0W or 5W refers to the pumpability in cold temperatures. 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.



What happens if I put 5W20 in my car instead of 5w30?


It's fine. Most ordinary 5W30's will shear down close to a 20W after the first 1000 miles anyway--and any 5W20 will be more shear resistant, by definition. You have nothing to worry about.



Can I use 5W20 instead of 0w20 RAV4?


So, what is the recommended oil type for the Toyota RAV4? For peak performance, you'll want to use synthetic oil with a grade of SAE 0W-20 or SAE 5W-20 for the Toyota RAV4.


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.