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Added Dex-Cool to green Prestone, should I change? #4661643
02/10/18 07:40 AM
02/10/18 07:40 AM
Joined: Oct 2010
Posts: 7,101
Michigan
A_Harman Offline OP
A_Harman  Offline OP
Joined: Oct 2010
Posts: 7,101
Michigan
Was out on the road earlier this week, and had to add coolant to my Dodge diesel. I bought a gallon of 50/50 prediluted coolant, but didn't notice that it was Dexcool until I was ready to pour it in. But I had to get going, so I added about 3/4 gallon of the 50/50 Dexcool to my 4-gallon system. Should I drain and refill with the proper Prestone green? Or how long can I run the weird coolant mix?


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: Added Dex-Cool to green Prestone, should I change? [Re: A_Harman] #4661650
02/10/18 07:54 AM
02/10/18 07:54 AM
Joined: Mar 2011
Posts: 566
High Country of Western NC
sopususer Offline
sopususer  Offline
Joined: Mar 2011
Posts: 566
High Country of Western NC
I haven't had any personal experience with this, but I've read that this is a bad idea to mix dex-cool and regular green. I have read it causes gelling in the cooling system. Others with more personal experience with validate or nix this notion.


2017 Subaru Impreza 2.0
QSUD 0W-20/Wix 57055
2017 GMC Sierra Denali 5.3
QSUD 0W-20/NAPA Gold 100255
2017 Subaru Forester 2.5
QSUD 0W-20/NAPA Gold 7055
Re: Added Dex-Cool to green Prestone, should I change? [Re: A_Harman] #4661656
02/10/18 07:59 AM
02/10/18 07:59 AM
Joined: Oct 2002
Posts: 506
Joplin
Cressida Offline
Cressida  Offline
Joined: Oct 2002
Posts: 506
Joplin
No need to rush but change it all out after the temps warm up in a month or so.

Continue to avoid the Dex-Cool. This would be the perfect time to switch it over to G05.

Re: Added Dex-Cool to green Prestone, should I change? [Re: Cressida] #4661666
02/10/18 08:10 AM
02/10/18 08:10 AM
Joined: Sep 2013
Posts: 10,691
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,691
Indiana
Originally Posted By: Cressida
No need to rush but change it all out after the temps warm up in a month or so.

Continue to avoid the Dex-Cool. This would be the perfect time to switch it over to G05.


x2 to all of the above aside from avoiding Dexcool. It's a good long life coolant; it just doesn't play well with others. The GM gasket failures that started the whole scare were due to poor material choices and had nothing to do with the coolant. GM owners disregarded their owners manual and added conventional green, which just added to the drama.

That said, Dexcool is still the factory fill for new GM vehicles.


03 Jeep WJ 4.0 202k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Added Dex-Cool to green Prestone, should I change? [Re: dlundblad] #4661683
02/10/18 08:28 AM
02/10/18 08:28 AM
Joined: Mar 2015
Posts: 5,430
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,430
Virginia
^^^^^^^^^

Exactly right by the previous two members.


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Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: Added Dex-Cool to green Prestone, should I change? [Re: dlundblad] #4661698
02/10/18 08:54 AM
02/10/18 08:54 AM
Joined: Jan 2013
Posts: 2,114
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 2,114
Texas
Originally Posted By: dlundblad
Originally Posted By: Cressida
No need to rush but change it all out after the temps warm up in a month or so.

Continue to avoid the Dex-Cool. This would be the perfect time to switch it over to G05.


x2 to all of the above aside from avoiding Dexcool. It's a good long life coolant; it just doesn't play well with others. The GM gasket failures that started the whole scare were due to poor material choices and had nothing to do with the coolant. GM owners disregarded their owners manual and added conventional green, which just added to the drama.

That said, Dexcool is still the factory fill for new GM vehicles.




When did GM cure the gasket problems . I have Dex in a 2005 Buick . ?

I agree , dump the mix , flush with clean water & fill with what Dodge recommends .

Best of luck to you .


Wyr
God bless
Re: Added Dex-Cool to green Prestone, should I change? [Re: WyrTwister] #4661710
02/10/18 09:01 AM
02/10/18 09:01 AM
Joined: Jun 2003
Posts: 17,838
Deplorable in apple valley, ca
Chris142 Online content
Chris142  Online Content
Joined: Jun 2003
Posts: 17,838
Deplorable in apple valley, ca
Originally Posted By: WyrTwister
Originally Posted By: dlundblad
Originally Posted By: Cressida
No need to rush but change it all out after the temps warm up in a month or so.

Continue to avoid the Dex-Cool. This would be the perfect time to switch it over to G05.


x2 to all of the above aside from avoiding Dexcool. It's a good long life coolant; it just doesn't play well with others. The GM gasket failures that started the whole scare were due to poor material choices and had nothing to do with the coolant. GM owners disregarded their owners manual and added conventional green, which just added to the drama.

That said, Dexcool is still the factory fill for new GM vehicles.




When did GM cure the gasket problems . I have Dex in a 2005 Buick . ?

I agree , dump the mix , flush with clean water & fill with what Dodge recommends .

Best of luck to you .
04 I believe. Don't forget that a diesel has different coolant needs than a gassers. Make sure to use diesel coolant in that Cummins.

Last edited by Chris142; 02/10/18 09:01 AM.

02 Wrangler carlube 5w30
87 F250 traveler 15w40
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Re: Added Dex-Cool to green Prestone, should I change? [Re: WyrTwister] #4661792
02/10/18 10:09 AM
02/10/18 10:09 AM
Joined: Sep 2013
Posts: 10,691
Indiana
dlundblad Offline
dlundblad  Offline
Joined: Sep 2013
Posts: 10,691
Indiana
Originally Posted By: WyrTwister
Originally Posted By: dlundblad
Originally Posted By: Cressida
No need to rush but change it all out after the temps warm up in a month or so.

Continue to avoid the Dex-Cool. This would be the perfect time to switch it over to G05.


x2 to all of the above aside from avoiding Dexcool. It's a good long life coolant; it just doesn't play well with others. The GM gasket failures that started the whole scare were due to poor material choices and had nothing to do with the coolant. GM owners disregarded their owners manual and added conventional green, which just added to the drama.

That said, Dexcool is still the factory fill for new GM vehicles.




When did GM cure the gasket problems . I have Dex in a 2005 Buick . ?

I agree , dump the mix , flush with clean water & fill with what Dodge recommends .

Best of luck to you .


Good question. I bought my 1997 knowing the lower intake manifold gaskets needed replaced. I drove it for ~4 months without any noticeable consumption. (Maybe 1 pint all together?)

If you aren't having to add coolant, I'd say you're in good shape. Typically, you can smell it too.


03 Jeep WJ 4.0 202k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: Added Dex-Cool to green Prestone, should I change? [Re: A_Harman] #4661824
02/10/18 10:31 AM
02/10/18 10:31 AM
Joined: Nov 2016
Posts: 1,283
WI
HoosierJeeper Offline
HoosierJeeper  Offline
Joined: Nov 2016
Posts: 1,283
WI
I would've thought an 01 Mopar took HOAT aka G05, I know for 02 they switched.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: Added Dex-Cool to green Prestone, should I change? [Re: A_Harman] #4662013
02/10/18 02:08 PM
02/10/18 02:08 PM
Joined: Dec 2006
Posts: 980
midwest
JamesBond Offline
JamesBond  Offline
Joined: Dec 2006
Posts: 980
midwest
I've seen a mix of orange and green coolant in a ranger that formed some globs of brown sludge. I don't know the history of the vehicle or how long they were mixed but it clogged up the overflow hose and was a bit of a mess.

I would drain and flush it pretty soon.

If the green was an "all makes/models" universal you may be in better shape but I wouldn't chance it in my vehicles.

Re: Added Dex-Cool to green Prestone, should I change? [Re: A_Harman] #4662107
02/10/18 03:59 PM
02/10/18 03:59 PM
Joined: Jul 2013
Posts: 413
D/FW Metroplex
The_Nuke Offline
The_Nuke  Offline
Joined: Jul 2013
Posts: 413
D/FW Metroplex
Originally Posted By: A_Harman
Was out on the road earlier this week, and had to add coolant to my Dodge diesel. I bought a gallon of 50/50 prediluted coolant, but didn't notice that it was Dexcool until I was ready to pour it in. But I had to get going, so I added about 3/4 gallon of the 50/50 Dexcool to my 4-gallon system. Should I drain and refill with the proper Prestone green? Or how long can I run the weird coolant mix?


Yes, IMO you should absolutely drain the system & you should probably do a flush on it as well. What you refill it with is up to you, just make sure it is all the same kind - no more mixing different kinds! wink

Probably quite a while, but potential consequences of mixing coolant types become more pronounced with time obviously. So you do not have to do it tomorrow, but you should not wait several months either. Do it as soon as you can, and you will be just fine I suspect.


2012 Charger Pursuit aka "The Bacon Hauler"
- 5.7L + NAG1 (A5) + 2.62 (215mm)
Re: Added Dex-Cool to green Prestone, should I change? [Re: HoosierJeeper] #4662193
02/10/18 05:35 PM
02/10/18 05:35 PM
Joined: Oct 2014
Posts: 2,550
San Antonio, TX
Nyogtha Online content
Nyogtha  Online Content
Joined: Oct 2014
Posts: 2,550
San Antonio, TX
Originally Posted By: HoosierJeeper
I would've thought an 01 Mopar took HOAT aka G05, I know for 02 they switched.


My 2001 Ram Sport 4X4 with 360 / 5.9L gasoline engine took traditional green coolant, it was the factory fill. I kept it with traditional green coolant and sold it in 2014. 2002 MY was the switch to G05 HOAT, through 2012 MY (my current Ram with 5.7L V8). MY 2013 forward has OAT.

OP, in Texas I would have just topped with distilled water and run that until autumn, but you're in a different environment. I'd drain & flush with distilled water at earliest reasonable opportunity. Not sure what I'd choose to go back with other than traditional green as I've never owned a diesel.

Last edited by Nyogtha; 02/10/18 05:45 PM.

"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: Added Dex-Cool to green Prestone, should I change? [Re: WyrTwister] #4662331
02/10/18 08:52 PM
02/10/18 08:52 PM
Joined: Nov 2016
Posts: 61
Missouri
hardheaded Offline
hardheaded  Offline
Joined: Nov 2016
Posts: 61
Missouri
when they went to the dry intake in 06.


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