![]() ![]() Hybrid organic acid technology (HOAT) is not compatible with OAT or NOAT coolants. It’s important to keep an eye on what coolant is being added to your trucks. What coolant is not compatible with organic acid technology (HOAT)? Most HOAT antifreezes will be labeled with terms like Global, G-05, G-11, G-12, or something of that sort. Not all IAT antifreeze and OAT antifreeze can be mixed together, so it’s definitely better left to the professionals to ensure it’s done correctly. Can You Make your own Hoat antifreeze?ĭo not try to make your own HOAT antifreeze. This is a derivative of OAT coolant, but has more anti-corrosive properties. There is also a third type of coolant called Hybrid Organic Acid Technology, or HOAT. Nonetheless, many manufacturers use it in modern vehicles due to its long lifespan. Is there a difference between oat and Hoat coolant? Mixing traditional IAT (green) antifreeze with an OAT antifreeze can also cause a world of problems. I probably only added a few cups of the G-05 do you think I will have any troubles from mixing the two ?, and prooooobably not? If it were my car I would flush it. Today I read that Chrysler switched to a OAT antifreeze and you should not mix them. I had a jug of G-05 HOAT and thought that it was the proper antifreeze to use. ![]() Some authors claimed so mixing HOAT (OAT+IAT) with OAT = FINE in terms of compatibility just not with the materials in his system long term and when I say not with the materials I mean the whole system being filled with this mixture and not just a minuscule amount that may have made it from the overflow bottle to the circulating coolant.Ī frequent inquiry we ran across in our research was “Can I mix G-05 HOAt and OAT antifreeze?”. To combat confusion, make sure that your coolants are properly marked and clearly labeled. If a system was running a NOAT and someone added OAT, the nitrite level would be diluted and possibly compromise cavitation protection, explained Mike Tourville, marketing director for Evans Cooling. 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. What happens if you mix up noat and OAT coolants? Usually, OAT-based coolants will be dyed a different colour to green anti-freeze. Do not try to make your own HOAT antifreeze. No, a HOAT coolant would need to be manufactured and premixed and then bottled and sold. Hopefully there’s nothing that resembles that mess in there. I would shine a flashlight along side the coolant recovery tank and look for muck, sludge, whatever you’d like to call it. ![]()
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