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Can I use 5W30 instead of 0W20 in a Subaru Impreza?

The short answer is: No, you should not use 5W30 oil instead of the recommended 0W20 oil in a Subaru Impreza. Using the wrong oil viscosity can potentially cause engine damage and negatively impact the vehicle's performance and fuel efficiency.


Explanation


The Subaru Impreza, like many modern vehicles, is designed to use a specific type of engine oil, in this case, 0W20 oil. This oil viscosity is recommended by the manufacturer to ensure proper lubrication, fuel efficiency, and engine protection under various driving conditions.


Using a different oil viscosity, such as 5W30, can have several consequences:



  • Reduced fuel efficiency: 0W20 oil is designed to have lower viscosity, which reduces engine drag and improves fuel economy. Using a thicker 5W30 oil can increase engine drag and decrease fuel efficiency.

  • Decreased engine protection: The 0W20 oil is formulated to provide optimal lubrication and wear protection for the engine components, especially in cold weather conditions. A thicker 5W30 oil may not provide the same level of protection, potentially leading to increased wear and tear on the engine over time.

  • Potential engine damage: The engine in the Subaru Impreza is engineered to work with the 0W20 oil specification. Using a different oil viscosity can cause increased friction, heat, and stress on the engine components, which may result in premature wear or even engine failure.


It's important to always follow the manufacturer's recommendations for engine oil viscosity and specifications to ensure the proper operation and longevity of your Subaru Impreza.

Why does my car need 0w20 oil?


0W-20 synthetic oil is thinner and more fluid than higher weight motor oil, which means that it can flow more easily through your engine. This allows for better lubrication and reduces friction between moving parts, which can help prolong the life of your engine.



Is 0W20 good for 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.



Can I use 5w30 instead of 0w20 in Subaru Impreza?


Synthetic oil-specifically 0W-20-is highly recommended for optimal engine performance and protection. If synthetic oil isn't available at the time of an oil change, 5W-30 conventional oil may be used instead. However, it should be replaced with synthetic oil at the next change.



Can I put 5w30 in my Subaru?


5W-30 synthetic motor oil is required for 2011 and newer turbo-charged Subaru vehicles.”



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


In summary, while using 5W-20 instead of 0W-20 may not cause immediate damage, it could lead to increased wear, reduced fuel efficiency, and potential warranty issues, especially in colder climates. It's best to follow the manufacturer's recommendations for the best performance and protection of your vehicle.



Can I put 5w30 instead of 0w20?


Using the proper viscosity motor oil will help protect and maintain the performance of your vehicle's engine. Thus, always refer to the manufacturer's recommendation while your vehicle is under warranty. **if you have a car that recommends 0W-20, do not use 5W-30 – back # of vis-grade must match or it is a no-go.



What is the best oil for a Subaru engine?


Subaru Oil Guide:

ModelSubaru Oil RequiredCapacity
Subaru Legacy & Outback XT (Turbo) 2020 - 20210W-20 Synthetic Oil4.8 Quarts
Subaru WRX 2002 - 20105W-30 Conventional Oil4.4 - 5 Quarts
Subaru WRX 2011 - 20205W-30 Synthetic Oil4.4 - 5.4 Quarts
Subaru Crosstrek 2013 - 20210W-20 Synthetic Oil4.4 - 5.1 Quarts



What engine oil does Subaru recommend?


Most new Subaru vehicles require synthetic oil with a viscosity rating of 0W-20.



What vehicles use 5W-20 oil?


Applications. 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.



What happens if you use 5w30 instead of 20?


The 5W-20, however, will remain a little thinner once you reach operating temperature to help improve fuel economy and flow fast enough to fill the tight tolerances in the engine. Using 5W-30 instead can reduce fuel economy and impede flow throughout the engine.


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.