What is the Correct Coolant for the Commander? - Page 3 - Jeep Commander Forums: Jeep Commander Forum
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post #21 of 73 (permalink) Old 06-21-2009, 09:35 PM
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Quote:
Originally Posted by robby View Post
Well, after discussing this a bit with 07 this morning, I went to my hangar to do some odds n ends.
One of the things to do was read the labels on one of my Prestone Dex-Cool 50/50 mix gallons.
It says ' Meets performance standards/specification OF Diamler Chrysler specification MS-7170 and MS-9769.
So after reading this entire thread......adamag has left me with my response being correct......I think.
That was when I responded to the OP that the product he had topped with was ok and 07 said I may be incorrect.
So, with apologies for maybe missing something in this thread, should I change my answer.....or not?
Now, don't make fun of the old guy,
Rob

I still dont think you are correct, but im just going off what the guy at the dealer told me. He specifically said not to use the Dex-Cool even though it says meets MS-7170 and MS-9769 as it isnt a Hybrid Organic Acid Technology (HOAT) type antifreeze. If I recall correctly he mentioned that the Dex-cool that you are refering to is for pre-2002 chrysler vehicles and that mixing the two would be bad.

Again Im just basing this off of what I was told. Is it correct, who knows. Maybe someone else on the forum can contact their dealer and get an opinion from someone else.

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post #22 of 73 (permalink) Old 06-21-2009, 09:37 PM
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My understanding based on what I have read is that Rob is correct and the OP used the correct coolant. If the Dex-Cool meets the Chrysler specs then it must be an OAT or HOAT coolant.

Edit: 07 has a valid point the coolant could be designed for pre 02 vehicles but I think it would still be OK to mix an OAT with an HOAT coolant. It seems the only thing that would be a bad idea is to mix the IAT with any OAT type coolant.

Another Edit: From the things I have read, the only difference between an OAT and an HOAT coolant is that the OAT is 100% new coolant and HOAT is a combination of new and recycled coolant.

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Last edited by adamag25; 06-21-2009 at 09:42 PM.
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post #23 of 73 (permalink) Old 06-21-2009, 09:56 PM
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http://www.wkjeeps.com/wk_cooling.htm

http://www.cherokeesrt8.com/forums/s...ad.php?t=19099

http://wiki.answers.com/Q/What_type_...herokee_Laredo

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post #24 of 73 (permalink) Old 06-21-2009, 10:08 PM
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I think.....
Prestone and others would not say they meet the specification (MS-7170/MS-9769)
if there was the slightest chance of any compromising of the cooling system.
The liability potental would be huge and inescapeable.
As far as the O.A.T./H.O.A.T. discussion, that would have to involve Prestone themselves to get a final answer.

Rob


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post #25 of 73 (permalink) Old 06-21-2009, 10:09 PM
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Quote:
Originally Posted by adamag25 View Post
My understanding based on what I have read is that Rob is correct and the OP used the correct coolant. If the Dex-Cool meets the Chrysler specs then it must be an OAT or HOAT coolant.

Edit: 07 has a valid point the coolant could be designed for pre 02 vehicles but I think it would still be OK to mix an OAT with an HOAT coolant. It seems the only thing that would be a bad idea is to mix the IAT with any OAT type coolant.
Dex-cool isnt a HOAT coolant. The only coolant out there besides the Mopar Hoat Coolant is Zerex G-05.

http://www.valvoline.com/products/br.../antifreeze/42

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Last edited by 07JeepXK; 06-21-2009 at 10:15 PM.
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post #26 of 73 (permalink) Old 06-21-2009, 10:19 PM
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I am still with rob on this one, assuming his coolant has not been sitting in his shop for the past 7 or 8 years then I think he is right. No company is going to put in print that a product will work if it is so well known that it will cause issue. I went to look at the bottle of coolant I have to see if it says anything about OAT or HOAT and I could not find anything. The only thing I got from reading the label was that I should not drink the coolant.......But I already know that because it tastes really bad even if you drink a lot of it.

Edit: 07 is correct the Dex-cool the OP has may not be a HOAT coolant. What I meant to say was that the formulation of Dex-Cool coolant that Rob has must be an HOAT coolant because it meets the Chrysler specs. If the OP's Dex-Cool doesn't meet the Chrysler specs than it may be an IAT coolant.

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post #27 of 73 (permalink) Old 06-21-2009, 10:26 PM
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Right off the back of the Zerex G-05 coolant bottle:

IMPORTANT CONSUMER INFORMATION:

Antifreeze/coolant chemistries are different. Products that contain Organic Acid Technology (OAT) chemistry are NOT approved by Ford and DiamlerChrysler for HOAT/G-05 applications. Products using OAT chemistry may be damaging to cooling systems that specify Hybrid Organic Acid Technology (HOAT) chemisrty based on OEM recommendations.



I still think robby is wrong.

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post #28 of 73 (permalink) Old 06-21-2009, 10:28 PM
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Quote:
Originally Posted by adamag25 View Post
Edit: 07 is correct the Dex-cool the OP has may not be a HOAT coolant. What I meant to say was that the formulation of Dex-Cool coolant that Rob has must be an HOAT coolant because it meets the Chrysler specs. If the OP's Dex-Cool doesn't meet the Chrysler specs than it may be an IAT coolant.
I think that the coolant robby has meets the Chrysler specs of pre-2001 vehicles.

EDIT: Dex-cool doesnt make a HOAT coolant

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post #29 of 73 (permalink) Old 06-21-2009, 11:01 PM Thread Starter
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Wow, lots of great replies but I am still not sure what the answer is. I put at most 1.5 pints of Prestone into my overfill reservoir so I should be okay. My Commander is an 06 with roughly 101,000 miles so I need to flush it out soon anyways.

And a49erFan I thought orange to orange coolant would be compatible but I wanted to double check before I added more. I wanted to make sure it wasn't going to sludge up all of the coolant/anti-freeze like I was told it would when I almost added Orange Prestone Dex-Cool to my C4 Corvette (which has green coolant/anti-freeze.)

Thanks,
Daniel

Last edited by DanielC4; 06-21-2009 at 11:07 PM.
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post #30 of 73 (permalink) Old 06-22-2009, 12:39 AM
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I agree that the Dex-cool is the wrong product for our Commander. Even though it is the same color, the chemical makeup is different. I know it is hard to find the right coolant, but I am glad that we have the HOAT coolant. This coolant is suppose to be good for 5 years or 100,000 miles.

DanielC4: When you do change the coolant, can you post a picture where the petcock is for the radiator.

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