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Can you mix green and blue coolant in an Acura?

The short answer is no, you should not mix green and blue coolant in an Acura. Acura vehicles are designed to use a specific type of coolant, and mixing different coolant colors can lead to compatibility issues and potential damage to the engine and cooling system.


Understanding Coolant Types


Coolant, also known as antifreeze, is a crucial fluid in a vehicle's cooling system. It helps regulate the engine temperature and prevent overheating. Acura vehicles typically use one of two types of coolant: green or blue.



  • Green Coolant: This is a traditional, ethylene glycol-based coolant that has been used in vehicles for decades. It is a green or yellowish-green color.

  • Blue Coolant: This is a newer, longer-lasting coolant that is typically made from propylene glycol. It is a bright blue color.


The type of coolant used in an Acura can vary depending on the model and year, so it's important to consult your owner's manual or contact an Acura dealer to determine the recommended coolant for your specific vehicle.


Why You Shouldn't Mix Coolant Types


Mixing green and blue coolant in an Acura can lead to several problems:



  • Compatibility Issues: Green and blue coolants may not be compatible with each other, as they can have different chemical compositions and additives. Mixing them can cause the coolant to become less effective and potentially lead to corrosion or other damage to the cooling system.

  • Reduced Effectiveness: The mixing of coolants can dilute the concentration of the additives and inhibitors that are designed to protect the engine and cooling system. This can result in reduced cooling performance and increased risk of overheating.

  • Voided Warranty: Mixing coolant types may also void the warranty on your Acura, as it goes against the manufacturer's recommendations for maintaining the vehicle.


To ensure the proper functioning and longevity of your Acura's cooling system, it's essential to use the recommended coolant type and avoid mixing different coolant colors.

Why did my blue coolant turn green?


Coolant turns green-blue
If a lot of copper and copper alloys are machined, the emulsion/solution can turn green-blue.



Can you mix green and blue coolant Acura?


Absolutely not. It's horrible for the cooling system as it will turn into a congealed mess that will begin to clog every cooling orifice. You will need multiple flushes to clean this out and even then, you may not get it all.



What color is Honda antifreeze?


Honda Long Life is one of the most common Honda antifreeze coolant products and usually comes in a blue color for more modern vehicles; however, certain older Honda models may use green-colored coolant.



What color is Honda Type 2 coolant?


Blue Coolant
Genuine Honda Type 2 Blue Coolant | PRE-MIXED | All Hondas. Tax Included (UK only) Shipping calculated at checkout.



What coolant colors can you not mix?


You should not mix green (IAT) type coolant and orange/pink (OAT) type coolant. The two antifreeze types are not chemically compatible. They can chemically react with each other causing a viscosity increase and even gelling in the cooling system.



What color is my Acura?


Find the exact color of YOUR car by looking at the Service Tag (illustrated above) that is located on the driver's side door jamb. Locate the "Color Code" on the tag. Then, find the part in the list whose color code matches yours.



Is car coolant blue or green?


Generally, Green coolant is used in older vehicles and lasts 2 years or around 30,000 miles. The Ethylene Glycol in coolant acts as anti-freeze, as it has a lower freezing point than water. When mixed with water it has a freezing point of -40 °C, meaning in freezing temperatures, it still remains as a liquid.



What happens if green and blue coolant mix?


The blue coolant has been formulated for longer/extended life, so mixing with green will diminish that life, but it will still function the same inside the engine/cooling system.



What color coolant for Acura?


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



What happens if you use the wrong color coolant?


Using the wrong antifreeze color can damage your engine by causing overheating, freezing, and corrosion within the cooling system.


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.