Diethylene Glycol, and <5 Hydrated inorganic acid, organic acid salts (the specifics of which are apparently proprietary). The primary ingredients are 88-95 Ethylene Glycol, <5. Perfect for cars and light-duty trucks that have radiators made of aluminum. The OAT coolants last a long time, but adding some silicates or phosphates adds a lot more anti-corrosion ability, at the trade-off of having to replace the coolant every now and then. The reason HOAT coolants exist is because of trade-offs. It is actually a 50/50 mix so you can use it instantly. Triumph HD4X is a HOAT coolant, and specifically a Si-Oat coolant. This is an inorganic coolant and an essential antifreeze that was blended with premium long-lasting inhibitors to stop corrosion.
#HOAT COOLANT AND OAT UPDATE#
Mixing different brands might not give you optimal results. To provide an update on my research, I finally found a SDS for the Mopar purple coolant. Prestone AF850 Dex-Cool 50/50 Antifreeze 1 Gallon. You want want to do whatever possible to keep these components protected and from having the system build scale and the OEM fluids have taken this into consideration. Drain the water, fill, drive and repeat, do it 3-4 times and you should have over 95 of water (you will never achieve the 100). They dont gel up when mixed because theyre very similar to begin with, only difference being that the H in HOAT is hybrid, meaning it has. Someone has an air or coolant leak and kept topping it up with tap water. Oxygen and hard water do this to the organics.
If you are worried, keep flushing the system with water and driving for a few days. This is from an improperly sealed cooling system. With these long life coolants it's best to use OEM where possible or something similar in chemistry to the OEM because there are certain considerations on how these will react with various metal types found in the cooling system, and how it reacts with the impeller in the water pump. Coolant flushes are made to work with water, they should not be used to get rid of leftover coolant. Mixing from one brand to the other but staying within the type (Eg: OAT with OAT, or HOAT with HOAT) won't have any ill effects but could shorten the usable life. 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. I noticed the antifreeze reservoir was a little low so I topped it off. There can be differences in OAT formulations, HOAT formulations and NOAT formulations. 1 I have a 2017 Chrysler Pacifica and did an oil change yesterday. Also, if a system was running a NOAT and someone added OAT, the nitrite level would be diluted and possibly compromise cavitation protection but it wouldn't be disastrous if the two were mixed, just wouldn't have the same protection. Hybrid organic acid technology (HOAT) is not compatible with OAT or NOAT coolants.
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