it depends on the year of manufacture. Some use OAT and some use HOAT depending on year. You will most likely have to order it or get it from dealer. Whatever you do, DO NOT use the generic green all purpose coolant. Mixing this in will gum up the coolant and cause problems.

 

JK/U's 2012 and older use HOAT coolant. 2013 and up use OAT coolant.

These two coolant types cannot be mixed. If they are, a chemical reaction will cause them to gel over time.

Mopar HOAT Part Number = 68048953AB

Mopar OAT Part Number = 68163848AA

This is directly from Chrysler:

Chrysler Corporation LLC. has released a new engine coolant for the 2013 model year vehicles and beyond, for all engine applications except the ones listed in the note above.

This new coolant is an Organic Additive Technology (OAT). OAT coolants have a service interval of 10 years or 150,000 miles. For heavy duty truck and extreme duty cycle applications refer to the Service Information or Owner's Manual for proper maintenance schedules.

CAUTION: Vehicle Damage may occur if dissimilar coolants are mixed!
Coolants of different technologies are not compatible nor interchangeable (OAT, HOAT or IAT). Mixing these coolants could result in:

• accelerated corrosion within the engine and cooling systems.
• the coolant having an ammonia smell.
• debris (particles) floating in the coolant.

Further inspection by the technician may find corrosion in the system. This could show up as aluminum pipes turning black in the coolant system, engine overheat, or leaks in the coolant system.

NOTE: If OAT (MOPAR P/N 68163848AA Purple) has been Mixed with HOAT (MOPAR P/N 68048953AB Pink Or Factory Fill HOAT Orange or any
other coolants have been mixed, it will be necessary to flush the cooling system.

 

JK/U's 2012 and older use HOAT coolant. 2013 and up use OAT coolant.

These two coolant types cannot be mixed. If they are, a chemical reaction will cause them to gel over time.

Mopar HOAT Part Number = 68048953AB

Mopar OAT Part Number = 68163848AA

68163848AA has been superceded by 68163848AB. That is the part number for OAT concentrate. If you want OAT 50/50 mix, you need part number 68163849AB. This post again highlights the need for posters to provide as much information about their Jeep as possible, as the answer differs from year to year or axle ratio to axle ratio, etc.

 

How do you know where it is, I can't see any marks to know if it's correct or not.

 

It is my understanding that Zerex G-05 is an HOAT coolant that is what I used recently in my 2012 JKUR. It's available at the big box stores in either a concentrate or 50/50 mix. NOt cheap In Chicago I paid 18.99 gallon

 

go to the dealer and get it...they will ask for the vin to make sure you get the wright one.

OAT is purple in color and HOAT is orange.

 

Don't trust the dealer completely. Make sure you know what you are buying.

I had the dealer look it up for me and he showed me on his computer screen that my 2015 Wrangler takes 5yr/100k HOAT, which is wrong. I showed him my user manual that clearly states 10yr/150k OAT. I got the 50/50 premix because I didn't want to deal with adding water. #68163849AB

 

I have never seen such chaos from coolant in my life. We have two 15 JKs and one has the purple OAT in the overflow and the other looks orange in the overflow. Open the radiator cap and they both look orange.

 

I agree with the chaos comment. I opened mine up for the first time during my last oil change and freaked out when the coolant was sh!t brown. I was ready to flush it. How will I ever know if the system is corroding with this color?

 

Appreciate all the comments. Thx folks!

 

Yes, i need to change the thermostat in my 2016, and the coolant in the overflow looks orange, WTF ???

 

OAT actually looks like 3 different colors.

Purple (new)
Orange (in the radiator and overflow)
Pink (overflow looks pink sometimes)

I just changed my thermostat.

Overflow looked orange.

Looked green when I spilled it on the ground. (i added Mopar leak detection die that was green)

Also factory coolant comes with leak detection die that affects the color.

New OAT Coolant being vacuumed into the radiator. Purple.

Old OAT Coolant...looks orange

OAT coolant with leak detection die looks green on the ground

OAT looks orange in the radiator and pink in a clean container or overfill

New OAT is purple

 

Be very careful when you have your Jeep serviced at the Jeep dealer.... I recently had my radiator hoses replaced at the dealer and the dealer's mechanic put in the WRONG antifreeze. I have a later model 2013 JKR [ my antifreeze is ALWAYS purple]. When I got home and checked the overflow bottle, I noticed the antifreeze was orange! I checked the antifreeze in the radiator and found it was also orange! I checked my dealer receipt and noticed the repair order listed the WRONG part number for the antifreeze used in my Jeep. Went back to the dealer and got the correct antifreeze installed for my Jeep.
BTW... although I know the correct antifreeze is rather expensive at the dealer, I would not recommend using anything other than the correct antifreeze from the Jeep dealer. I have seen what mixing antifreezes can do to a Jeep and believe me, it is NOT pretty!
Another note: I have always had to add antifreeze [about a pint or two] to my overflow bottle at every oil change [every 4000 miles or so] since I purchased the Jeep new in 2013. There are no leaks in the radiator or overflow bottle, all the hose clamps are tight and I never have any antifreeze smell. I do rather aggressive off pavement travel in Moab and Colorado. Any other JK owners notice this? One friend of mine hooked up a custom overflow to the Jeep overflow bottle and recovered his antifreeze that way.

 

Any other JK owners notice this?

Yes. I have to add a 2 cups per year to keep the overflow around max fill.

I don't let the dealers service my Jeep.

 

I think I have gremlins who very occasionally sip a spoonful or two of coolant from my 2015 JKU - which I replace with MOPAR OAT.

Have searched and searched - no white tale-tail trails down upper rear face of radiator. No overheating. No choco milk in oil. No mischief in radiator. Only cooling problem to date has been need for a new thermostat assembly when the system threw code P0128 (IIRC) which I replaced myself with a MOPAR part.

Believe Old Dogger mentioned it above - the coloration between the HOAT and OAT makes it even worse, esp for those in the 2013 changeover timeframe. Below is a link to a chrysler tech bulletin. Page 4 shows the coloration mischief - and also the engine clogging (and killing) goop that results from when HOAT and OAT are mixed - even had a friendly note to dealer techs in servicing coolant to “be careful and use the correct one lest they have to buy a new engine…”. Smh…

http://starparts.chrysler.com/newsletters/newsletter_Oct_2012.pdf

 

My 21 2.0 has a leaky water pump. Went to get coolant and all auto zone had for my vehicle was orange colored oat coolant.
The coolant in my reservoir is pink. Should I buy the orange oat coolant it shop for the pink stuff?

 

Use only the Mopar OAT 50/50 MIX Antifreeze. Available from your Dealer, or on Amazon.

 

i would just put Mopar OAT back in.
need to have it on hand not when you need it.
forced to buy it at the dealer if you wait until you need it.
not a fan of mixing coolant.

 

I opened up the black tank and it was completely empty so I put some prestone universal coolant in there. I’ll order the mopar stuff to have until I can get it to the shop. The leak looks to be coming from what I’d guess is the water pump. Out the seal.

 

how many miles on it?

 

Do a flush then run lime green Prestone.