Loading

Can I use orange coolant instead of yellow?

The short answer is no, you should not use orange coolant instead of yellow coolant in your vehicle. While they may appear similar, orange and yellow coolants are not interchangeable and using the wrong type can potentially damage your car's 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. There are several different types of coolant, each designed for specific applications and compatible with certain materials used in the cooling system.


The two main types of coolant are:


  • Yellow coolant, also known as conventional or inorganic acid technology (IAT) coolant, is the most common type and is compatible with older vehicles.

  • Orange coolant, also known as extended life coolant or organic acid technology (OAT) coolant, is designed for newer vehicles and has a longer service life.



Using the wrong type of coolant can lead to compatibility issues, corrosion, and damage to the cooling system components.


Why Can't I Use Orange Coolant Instead of Yellow?


There are a few key reasons why you should not use orange coolant instead of yellow coolant:


  • Compatibility: Orange and yellow coolants are not compatible with each other. Mixing the two can cause the coolant to become contaminated, leading to sludge buildup and potential damage to the cooling system.

  • Corrosion protection: Yellow and orange coolants use different corrosion inhibitors, which are designed to protect specific materials used in the cooling system. Using the wrong type can lead to accelerated corrosion of metal components.

  • Service life: Orange coolant is formulated to last much longer than yellow coolant, typically up to 5 years or 150,000 miles. Using orange coolant in a vehicle designed for yellow coolant may not provide the same level of long-term protection.



To ensure the proper functioning and longevity of your vehicle's cooling system, it's essential to use the coolant type recommended by the manufacturer. Consult your owner's manual or speak with a qualified mechanic to determine the correct coolant for your car.

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.