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What is Subaru coolant made of?

Subaru coolant, also known as Subaru Long Life Coolant, is a glycol-based antifreeze and coolant solution designed specifically for Subaru vehicles. It is a mixture of ethylene glycol, water, and various additives that help protect the engine and cooling system from corrosion, rust, and overheating.


Composition of Subaru Coolant


Subaru coolant is primarily composed of the following ingredients:



  • Ethylene Glycol: This is the main antifreeze component, which lowers the freezing point of the coolant and raises its boiling point. Ethylene glycol helps prevent the engine and cooling system from freezing in cold weather and overheating in hot weather.

  • Water: Distilled or deionized water is used to dilute the ethylene glycol and create the coolant solution. Water helps transfer heat from the engine to the radiator.li>
  • Corrosion Inhibitors: Subaru coolant contains a blend of organic and inorganic corrosion inhibitors, such as silicates, phosphates, and organic acids. These additives help protect the metal components in the cooling system from rust and corrosion.

  • Dye: Subaru coolant is typically green or blue in color, which helps distinguish it from other types of coolant. The dye is added for identification purposes.li>

The specific formulation of Subaru coolant may vary slightly between different model years and regions, but the core components remain the same.


Benefits of Using Subaru Coolant


Subaru recommends using its proprietary coolant for several reasons:



  • Compatibility: Subaru coolant is specifically designed to work with the materials and components used in Subaru's cooling systems, ensuring optimal performance and protection.

  • Longevity: Subaru coolant is formulated to last for up to 11 years or 105,000 miles, reducing the need for frequent coolant changes.

  • Corrosion Protection: The corrosion inhibitors in Subaru coolant help prevent damage to the cooling system, extending its lifespan.li>
  • Thermal Stability: Subaru coolant maintains its properties and performance even under high temperatures, helping to prevent overheating.li>

Using the correct Subaru coolant is essential for maintaining the health and longevity of your Subaru's cooling system.

Is Subaru coolant blue or green?


For a long time, Subaru only used one coolant which was a standard not pre-mixed green coolant. Then around 2008, they came out with a pre-mixed blue Super Coolant. So what is the difference between these two coolants?



How long is Subaru coolant good for?


How often should you change coolant in a Subaru? Typically, you should have your Subaru coolant flush completed each 30,000 miles or each two years. There are some instances where your vehicle can go without a flush for a longer period of time.



Can I use orange coolant in a Subaru?


What color coolant does Subaru use? It's critical to understand that color doesn't matter. While most Organic Acid Technology (OAT) coolants are frequently orange, yellow, red or purple, Hybrid Organic Acid Technology (HOAT) coolants are orange and yellow. So evidently, there's quite a bit of overlap.



What happens if you use blue coolant instead of green?


Putting the Wrong Engine Coolant in Your Car
As mentioned above, the mix can solidify, block your engine, and cause overheating, which can, in turn, cause the following problems: Degraded cylinder heads. Head gasket breakage. Marred hoses.



How often should you change the coolant on a Subaru?


every 2-3 years
A good rule of thumb is every 2-3 years, or 24,000 to 36,000 miles. Depending on conditions, you may need to change it more frequently so be sure to check with your Subaru service advisor.



What year did Subaru switch to blue coolant?


Subaru switched to the "Super Coolant" around 2008- it's teal in color, and comes pre-mixed. The old "long Life" coolant is green, and it comes as a concentrate. It is very much still available. yup! and only some late 2008 vehicles came with the blue.



What happens if you use the wrong coolant?


Putting the Wrong Engine Coolant in Your Car
As mentioned above, the mix can solidify, block your engine, and cause overheating, which can, in turn, cause the following problems: Degraded cylinder heads. Head gasket breakage. Marred hoses.



Is Prestone coolant ok for Subaru?


Trust Prestone – a leading global manufacturer of Original Equipment Antifreeze + Coolant. Can top off or replace any Blue antifreeze + coolant in all Honda; all Acura; Nissan 2009 and newer; Infiniti 2009 and newer & Subaru 2009 and newer vehicles, guaranteed.



Is Subaru coolant ethylene glycol?


Shop OEM Subaru Part # SOA868V9260. Super Coolant CONCENTRATE. This ethylene glycol-based antifreeze/engine coolant combines extreme cold weather protection with long-lasting.



Do Subaru's need special coolant?


This will hold true in most all Subaru Outbacks, Impreza, Forester, Legacy and WRX models. If you own a 1999 to 2008 SOHC 2.5l you should use the O.E. Subaru Long Life Coolant that is green in color pictured below.


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.