Do not mix two different types of coolant/ antifreeze.While it is okay to switch to a new coolant, here are a few points to keep in mind: Note When You Switch to a New Coolant/ Antifreeze ![]() ![]() Organic coolants use the Organic Acid Technology (OAT) in manufacturing. OAT: As mentioned, these purely use carboxylate additives to inhibit corrosion, which extends the life of the coolant superlatively. The HOAT formulation is a combination of the OAT formulation and the IAT formulation. To make sure you’re choosing the right HOAT coolant, look at the brand name, rather than the liquid’s color. You can find HOAT coolant in yellow, orange, green, pink and blue. If even a small amount - as little as 10 - of regular coolant is inadvertently added to an OAT system, it can cause significant damage to your machine. It’s now available in a rainbow of colors. It may be ok to use for 2 years, but GM says it can be used up to 5 years/150,000 miles. While there are many different types of coolants available on the market, you should never mix OAT ( Organic Acid Technology) coolant with regular coolant. It plugs everything up with a brown waxy substance that nothing I know of will remove. I have seen many cooling systems destroyed by it. It has a service distance of 30,000 miles (50,000 km.) before it must be replaced. A coolant is a liquid substance that has ethylene glycol, water, and inhibitors as parts of its formulation. This is an OAT or HOAT coolant, and is some really nasty stuff. Most of the HOATs use sebacates, while most or all OATs use 2-EHA, but what makes a HOAT a HOAT is the presence of silicates or phosphates together with the. This article will analyze Mopar coolant as equivalents in these two categories. Inorganic coolants which are usually green in color utilize the Inorganic Acid Technology (IAT) in its formula. The author of the article is wrong about Toyota Pink being an OAT - because it has organic acids AND inorganic inhibitors (phosphates), it is a HOAT - hybrid organic acid technology. But, are there any equivalent options to Mopar? Mopar is a famous coolant/antifreeze brand used across the board. However, OAT and HOAT are more popular these days. It does this by ensuring that the cooling system does not freeze when it is cold and removes excess heat that can cause corrosion.Ĭoolants are classified into three main types: IAT, OAT, and HOAT. These antifreeze use organic acids but not 2-EHA and usually include silicates to provide protection for aluminium surfaces. ![]() HOAT anti-freeze/HOAT coolant HOAT stands for Hybrid OAT. They must be changed once every five years or 150,000 miles. Coolant, also known as antifreeze, protects your engine from effects of extreme temperature. Usually, OAT-based coolants will be dyed a different colour to green anti-freeze.
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