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Hey guys,

After hours and hours of research I'm just about back where I started. I noticed my coolant was low not too long ago so I went into my owners manual and found that my 2013 Ram 1500 required OAT coolant. I ordered a jug off amazon to top off my truck and realized the jug of OAT and what is in my coolant tank are two different colors. The OAT in the jug is undeniably purple and the OAT in my coolant tank is orange. I pulled some out of my truck and sat it onto a white envelope and it appeared slightly purple. I then pulled about 10mL out of truck and poured it into a clear container and it was undeniably orange with no real purple tint too it. After some research I found that in 2013 they switched coolants from HOAT to OAT so my truck, being manufactured in 7/13, should certainly have the purple OAT in it. I also found out that sometimes the factory fill OAT was orange. So now I'm back at square one trying to figure out what coolant to add. A definitive answer would be great considering I've spent hours attempting to figure this out.

Thanks guys.
 

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I only know the orange mopar antifreeze as HOAT and the purple as OAT. I do know you can’t mix the two. Mean while you can add some distilled water to be safe.
 

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Don't let the different colors confuse you

Its first dye colors were orange and red. These dye colors are still used by General Motors and Caterpillar. Green, pink and blue have been added to the list of available OAT antifreezes.
It is recommended that OAT not be mixed with any other antifreeze technology.

You need OAT Coolant, plain & simple
In 2012 Chrysler switch to OAT

Mixing OAT and HOAT is not good. it will gunk up everything
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Listen what this video says about COLORS

https://www.youtube.com/watch?v=kDyeFGMGETY
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more about the different types of coolant from MOPAR
notice also what he says about FIAT vs. US MOPAR OAT coolants

https://www.youtube.com/watch?v=OrN4cehxjGY
 

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This has been the subject of much confusion; there's a pretty long thread on it in one of the Jeep forums. You definitely don't want to mix coolant.

I think the switch to OAT was made in 2013, not 2012. I am still pretty sure we have OAT in our 2013s despite it being pink and will be changing it out with OAT this Spring when I get back from deployment-the manual says OAT. I guess I should check what color it is in the Durango since it uses OAT too
 

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Hey guys,

After hours and hours of research I'm just about back where I started. I noticed my coolant was low not too long ago so I went into my owners manual and found that my 2013 Ram 1500 required OAT coolant. I ordered a jug off amazon to top off my truck and realized the jug of OAT and what is in my coolant tank are two different colors. The OAT in the jug is undeniably purple and the OAT in my coolant tank is orange. I pulled some out of my truck and sat it onto a white envelope and it appeared slightly purple. I then pulled about 10mL out of truck and poured it into a clear container and it was undeniably orange with no real purple tint too it. After some research I found that in 2013 they switched coolants from HOAT to OAT so my truck, being manufactured in 7/13, should certainly have the purple OAT in it. I also found out that sometimes the factory fill OAT was orange. So now I'm back at square one trying to figure out what coolant to add. A definitive answer would be great considering I've spent hours attempting to figure this out.

Thanks guys.





I am having the same problem you are having in regard to coolant. I have a 2013 Ram 1500 Hemi. The coolant in the reservoir is pink. I was at a Dodge dealer getting 2-re-calls taken care of. I talked with a service rep. who informed me I should have the 'purple' coolant. I purchased two gallons of the purple. Like you, I've done a lot of checking and research and I've decided to have the pink flushed-out then replace it with the purple.


Chuck
 

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Has anyone trie scooping a little coolant from their reservoir into a cup and adding some purple to see if it reacts?
 

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My 2013 owners' manual calls for OAT, why is there confusion?
 

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Hey guys so my truck is also a little low on coolant and I’m not sure if it has HOAT or OAT in it. It’s a 2013 1500 with a Hemi and was built on October 2012. The owners manual says it takes the 10 year OAT but the coolant in the truck right now is orange. I have jug of the Mopar 10 year OAT concentrate (part number: 68175338AB) which is clearly purple. From what I’ve read online my truck SHOULD be filled with OAT since it calls for it in the manual but being that begin that it was built in 2012 has me concerned that it may be filled with HOAT. I took about a tablespoon of coolant from the rad and a tablespoon of coolant from the jug premixed with distilled water and mixed them both together in a old water bottle, been sitting for about 3 hours now and still looks very fluid. Will let it sit for overnight and check it again in the morning
 

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No reason for confusion on a 2013 Ram
Chrysler/Fiat Rams model years runs from July 1 to June 31 typically, some years were maybe 2 months different

So they would typically begin building 2013 Rams in July of 2012
 

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What matters should be the model year of the vehicle, not the calendar year in which it was built, since part changes correspond with models
 

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As long as you do a full flush with distilled water when you change it I don't think it will matter anyway
 

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I accidentally added green to mine after changing the waterpump. I could see little balls of gell like substance. I drained, flushed several times with water, and filled with green. I've put 5,000 miles on now with zero issues. It did end up a little too diluted, (was only good to -7), so I drained again today and filled again. The inside of radiator looked brand new. Now I'm good down to -36. Reason I did this today is it's supposed to get below zero here the next few nights.
 

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I'm honestly still not sold on the different dye theory. My late model build '13 came with the pink/orange fluid. So bought a bottle of the 5 year pink/orange from the dealer and took some fluid from the radiator. I mixed them in a tupperware and put that in my closet. That was about 5 or so months ago. It's still the same color/clarity as it was originally. Not gelling or other reacitons....Oh well... I'll just flush and fill with new pink 5 year when the weather gets nicer.
 

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I'm honestly still not sold on the different dye theory. My late model build '13 came with the pink/orange fluid. So bought a bottle of the 5 year pink/orange from the dealer and took some fluid from the radiator. I mixed them in a tupperware and put that in my closet. That was about 5 or so months ago. It's still the same color/clarity as it was originally. Not gelling or other reacitons....Oh well... I'll just flush and fill with new pink 5 year when the weather gets nicer.
I may get some purple and suck a little out of my radiator to see if they mix to confirm this
 

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I just went through this debacle myself. The purple Mopar OAT coolant will turn pink\orange over time cycling through the engine and cooling system. I have a thread on another forum that shows pictures of the coolant in my wifes 2017 Jeep GC that calls for OAT coolant but has turned pink/orange and looked identical to what drained out of my truck. Whatever you do, DO NOT mix OAT and HOAT coolant it will sludge up your engine and cooling system.

I also have 3 samples setup with OAT and HOAT mixed. One is the control which is new OAT and HOAT mixed with water, the next is my truck sample and OAT plus water, and the third is my truck sample plus HOAT and water. I can tell you the control and the last one have an ammonia smell which is what happens when OAT and HOAT are mixed while the middle with my truck sample and OAT smells like coolant. Not very scientific but its something that points to the 2013s got OAT coolant...
 

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So what if you let the dealer change it and it is a 2013 and calls for OAT but it has orange HOAT from the factory and it gels and screws up your motor will Chrysler pay or play stupid.
 
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