The third thing you need to know is that the cap on the OAT is black while the cap on the HOAT is blue. The second thing you'll notice is that the HOAT coolant is rated for 5 years and 100K miles while the OAT is rated at 10 years 150K miles. The first thing you are going to notice is the color.OAT (13+) is purple and HOAT (12-) is orange. How to tell the difference.For whatever reason, chrysler doesnt label them as HOAT/OAT so you need to know the signs to make sure you are getting the correct one. CHANCES ARE THEY WILL PUT IN THE WRONG ONE, SO IF GETTING SERVICE, MAKE CERTAIN THE CORRECT COOLANT IS USED! DO NOT COUNT ON THE DEALER KNOWING WHICH COOLANT YOUR RIG TAKES. JK's 2012 and down use HOAT coolant and 2013+ use OAT coolant. THESE TWO COOLANTS DO NOT MIX, AND A CHEMICAL REACTION WILL CAUSE IT TO GEL (more on this later.) The first thing you need to tattoo in your brain is this. Ok, first thing is first.there are two types of coolants used on the JK.HOAT (Hybrid Organic Additive Technology,) and OAT (Organic Additive Technology.) See your service manual to confirm.Hey guys, I haven't seen a thread like this here, so I would like to post it up.if the higher powers find it useful enough, I think it should be a sticky, as a very innocent move can cause HAVOC on your entire cooling system/motor.THIS IS BECOMING A VERY COMMON PROBLEM AND WILL ONLY GET WORSE.DEALERS DON'T KNOW WHAT THEY ARE DOING AND ARE JUST DUMPING IN WHATEVER COOLANT IS ON-HAND. OEM approved Mercedes-Benz MB 325.0 coolant antifreeze type. What color is Hoat antifreeze?ġ.5 Liter Bottle Case of 10 Premixed ready-to-use. Fill the radiator up to where the cap goes.ġ.5 Liter Bottle Case of 10 Premixed ready-to-use. This seems counter-intuitive, but you want the coolant circulating as you fill the radiator. Check the label to see if your coolant is pre-mixed.
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