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What happens if you put the wrong oil in a Subaru?

Putting the wrong oil in a Subaru can have serious consequences for the vehicle's engine and overall performance. Subarus are designed to run on a specific type of oil, and using the wrong kind can lead to a range of problems, from decreased fuel efficiency to complete engine failure.


Understanding Subaru's Oil Requirements


Subaru engines are engineered to work best with a synthetic oil that meets the manufacturer's specifications. This oil is designed to provide optimal lubrication, reduce friction, and protect the engine from wear and tear. Using a different type of oil, such as a conventional or non-synthetic blend, can cause the engine to work harder and generate more heat, leading to premature wear and potential damage.


The Consequences of Using the Wrong Oil


Putting the wrong oil in a Subaru can have several negative consequences, including:



  • Decreased Fuel Efficiency: Non-synthetic oils can create more friction within the engine, leading to a decrease in fuel efficiency and higher fuel consumption.

  • Increased Engine Wear: Improper lubrication can cause the engine's moving parts to wear down more quickly, leading to a shorter lifespan for the engine.

  • Engine Damage: In severe cases, using the wrong oil can cause the engine to seize up or suffer catastrophic failure, requiring a costly repair or even a complete engine replacement.


It's important to note that the consequences of using the wrong oil can vary depending on the specific Subaru model, the severity of the mismatch, and the duration of use. However, it's generally recommended to always use the oil type specified by the manufacturer to ensure the best performance and longevity of the vehicle.


Preventing Oil-Related Issues


To avoid the problems associated with using the wrong oil in a Subaru, it's essential to:



  • Check the Owner's Manual: Consult the owner's manual to determine the recommended oil type and viscosity for your Subaru model.

  • Use Genuine Subaru Oil: When changing the oil, use a high-quality, synthetic oil that meets the manufacturer's specifications.

  • Follow the Recommended Oil Change Interval: Adhere to the oil change schedule outlined in the owner's manual to ensure the engine is properly lubricated and protected.


By following these simple steps, you can help ensure the longevity and optimal performance of your Subaru's engine, and avoid the costly consequences of using the wrong oil.

What happens if I put 1 quart of the wrong oil in my car?


One quart of the incorrect viscosity is highly unlikely to harm anything. Just take it for an oil change for peace of mind. By the way, you should check your oil level regularly. don't wait for the light. It could save you some grief down the road.



Can putting the wrong oil damage an engine?


Choosing the wrong type of oil might have serious repercussions. The wrong type of oil might be either too thick or too thin for the engine, which can harm moving elements like bearings and pistons. In extreme situations, this may lead to engine failure as well as lower performance and increased wear and tear.



What happens if I put 5W20 instead of 5W30?


While using it temporarily in a pinch likely won't cause your engine lasting harm, remember that the engineers who built your engine did so with a specific viscosity oil in mind, meaning it's best to stick with it. Some automakers do recommend different viscosities of oil depending on weather conditions.



What happens if you 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. **Offers same protection as 5W but also provides faster flow and better fuel economy.



Why is my car losing oil but no leak or smoke?


When a car begins to lose oil but doesn't display any visible leaks, there could be several culprits at play. Common reasons include worn piston rings, a damaged head gasket, or an accumulation of oil in the engine's air-filtration system.



What happens if you 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. **Offers same protection as 5W but also provides faster flow and better fuel economy.



What year did Subarus burn oil?


Many Subaru owners have found that the 2.0L, 2.2L, and 2.5L engines powering some Subaru vehicles built after 2011 consume more oil than usual. The most affected models include: 2011-2015 Forester. 2013-2014 Legacy.



What happens if the vehicles engine oil is not changed as required?


Engine Overheating: The oil loses viscosity and fails to regulate the engine's temperature. This can lead to overheating and, eventually, total engine failure.



What are the symptoms of wrong engine oil?


What are the symptoms of having the wrong oil in your car?

  • Leaks.
  • Unusual engine sounds such as tapping or knocking.
  • A strange burning smell.
  • Poor fuel efficiency.
  • Failure to start in cold conditions.
  • Engine or oil-related warning lights.
  • Engine failure or overheating.



What causes Subaru engines to burn oil?


Reason #1: Bad Piston Rings
Over time, these piston rings can wear down. As they wear, they'll allow oil from the crankcase to seep past the pistons, where the oil will be burned by the engine. New piston rings can be costly, but it'll be a necessary procedure to keep the engine from burning 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.