Recommended Coolant?
Safety Car
Joined: May 2016
Posts: 4,669
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From: Erlanger, Kentucky
Melting Slicks
Joined: May 2020
Posts: 2,136
Likes: 1,309
From: North Little Rock, AR
Dex Cool is recommended. Do not mix different coolant types as it will cause issues unless completely flushed as mentioned above.
Might want to do some research on filling it back up to avoid getting air in the system. It’s a bitch to get out if it happens. Ask me how I know.
Might want to do some research on filling it back up to avoid getting air in the system. It’s a bitch to get out if it happens. Ask me how I know.
Drifting
Joined: Mar 2010
Posts: 1,901
Likes: 361
From: TX
FYI, don't ever put Dex Cool in any other brand vehicle, it will void the warranty. The acid (2-HEA) GM uses in it will eat seals and is really nasty stuff. GM had to reformulate the seals they use just to withstand it. Personally, I think you're better off getting all the Dexcool out of your system and replacing it with a phosphated organic acid (POAT) type coolant.
Racer
Joined: Jan 2024
Posts: 255
Likes: 149
From: Florida
https://www.americanmusclecarmuseum....servation.html
Thread Starter
Advanced
Joined: Jun 2023
Posts: 64
Likes: 19
From: Brownsburg, IN
I am going with the latest long lasting Dexcool. I wasn´t sure if it was backward compatible, but it sounds like it is, from the helpful responses here.
I always go with the pre-mix 50/50. No need for greater than 50/50 at my latitude and no worries about distilled water.
Thank you all! Please let me know if there are any other tips to doing this. I will be doing it in the next 2 ro 4 weeks.
I always go with the pre-mix 50/50. No need for greater than 50/50 at my latitude and no worries about distilled water.
Thank you all! Please let me know if there are any other tips to doing this. I will be doing it in the next 2 ro 4 weeks.
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Drifting
Joined: Aug 2022
Posts: 1,510
Likes: 430
From: Ruskin, FL
This is what the maintenance staff for the American Muscle Car Museum recommends and use on their cars.
https://www.americanmusclecarmuseum....servation.html
https://www.americanmusclecarmuseum....servation.html
CF Community Team
Joined: Apr 2016
Posts: 14,163
Likes: 7,439
From: Pittsburgh
2025 C6 of the Year Finalist - Unmodified
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Loke the others have posted, OEM Dexcool
Safety Car
Joined: May 2016
Posts: 4,669
Likes: 1,849
From: Erlanger, Kentucky
This is what the maintenance staff for the American Muscle Car Museum recommends and use on their cars.
https://www.americanmusclecarmuseum....servation.html
https://www.americanmusclecarmuseum....servation.html
And it is not cheap. Would be at least $200 for enough to fill your coolant system. And to get all of the water out of the loop, you would likely need to do at least a single fill and drain of the Evan’s to remove most of the water from the system as they recommend.
Evan’s would be fine for a weekend cruiser or classic muscle car.
Safety Car
Joined: Feb 2016
Posts: 4,457
Likes: 1,391
From: SC
I am going with the latest long lasting Dexcool. I wasn´t sure if it was backward compatible, but it sounds like it is, from the helpful responses here.
I always go with the pre-mix 50/50. No need for greater than 50/50 at my latitude and no worries about distilled water.
Thank you all! Please let me know if there are any other tips to doing this. I will be doing it in the next 2 ro 4 weeks.
I always go with the pre-mix 50/50. No need for greater than 50/50 at my latitude and no worries about distilled water.
Thank you all! Please let me know if there are any other tips to doing this. I will be doing it in the next 2 ro 4 weeks.
Thread Starter
Advanced
Joined: Jun 2023
Posts: 64
Likes: 19
From: Brownsburg, IN
I guess I thought I saw a newer 10 year version, but I might be mistaken. Either way, it will be Dexcool for compatibility.
Is Dexcool still orange, or have they changed that? It has been awhile since I owned a GM vehicle. I think my last was a gen 1 Buick Enclave. I can´t remember the year. I´ve since then owned Jeeps and Mopar has changed their coolant and rated it for 10 years, 300,000 miles. I may have subconsciously thought GM did the same with Dexcool.
Is Dexcool still orange, or have they changed that? It has been awhile since I owned a GM vehicle. I think my last was a gen 1 Buick Enclave. I can´t remember the year. I´ve since then owned Jeeps and Mopar has changed their coolant and rated it for 10 years, 300,000 miles. I may have subconsciously thought GM did the same with Dexcool.
Racer
Joined: Jan 2024
Posts: 255
Likes: 149
From: Florida
No
Read and learn. https://evanscoolant.com
Race Director
Joined: Jul 2005
Posts: 12,045
Likes: 3,588
From: Central MO
I guess I thought I saw a newer 10 year version, but I might be mistaken. Either way, it will be Dexcool for compatibility.
Is Dexcool still orange, or have they changed that? It has been awhile since I owned a GM vehicle. I think my last was a gen 1 Buick Enclave. I can´t remember the year. I´ve since then owned Jeeps and Mopar has changed their coolant and rated it for 10 years, 300,000 miles. I may have subconsciously thought GM did the same with Dexcool.
Is Dexcool still orange, or have they changed that? It has been awhile since I owned a GM vehicle. I think my last was a gen 1 Buick Enclave. I can´t remember the year. I´ve since then owned Jeeps and Mopar has changed their coolant and rated it for 10 years, 300,000 miles. I may have subconsciously thought GM did the same with Dexcool.
Drifting
Joined: Aug 2022
Posts: 1,510
Likes: 430
From: Ruskin, FL
This is just not true. Some of our cars use the “Classic Preservation” formula. Others use the “high performance” formula.
Read and learn. https://evanscoolant.com
Read and learn. https://evanscoolant.com
The guys that restore, and maintain the cars seem to be pretty knowledgeable about the hundreds of millions dollar collection they care for. I'll trust their word. And the man that owns them all certainly has the cash to do whatever he wants to them.
Last edited by Corvette_Dez; May 3, 2025 at 10:56 AM.
Safety Car
Joined: Feb 2016
Posts: 4,457
Likes: 1,391
From: SC
Evan’s is an interesting coolant. But it is nothing special. It is basically a water free ethylene glycol with some anti-corrosion additives. And it is no where near as good as a coolant as a water and glycol mixture as it’s thermal conductivity is about half that of water/glycol.
And it is not cheap. Would be at least $200 for enough to fill your coolant system. And to get all of the water out of the loop, you would likely need to do at least a single fill and drain of the Evan’s to remove most of the water from the system as they recommend.
Evan’s would be fine for a weekend cruiser or classic muscle car.
And it is not cheap. Would be at least $200 for enough to fill your coolant system. And to get all of the water out of the loop, you would likely need to do at least a single fill and drain of the Evan’s to remove most of the water from the system as they recommend.
Evan’s would be fine for a weekend cruiser or classic muscle car.
This is just not true. Some of our cars use the “Classic Preservation” formula. Others use the “high performance” formula.
Read and learn. https://evanscoolant.com
Read and learn. https://evanscoolant.com
I'm sorry to tell you, but I was there last weekend for the ALZBBQ. I talked with the staff in great detail about it. I was curious why they had battery maintainers on every one of the 245 plus cars. "He likes to move them around every once in awhile. "
The guys that restore, and maintain the cars seem to be pretty knowledgeable about the hundreds of millions dollar collection they care for. I'll trust their word. And the man that owns them all certainly has the cash to do whatever he wants to them.
The guys that restore, and maintain the cars seem to be pretty knowledgeable about the hundreds of millions dollar collection they care for. I'll trust their word. And the man that owns them all certainly has the cash to do whatever he wants to them.
So waterless Evans coolant may be fine for classic cars that are started up occasionally and moved around but I wouldn't use it in anything you are going run hard. I read through every page of their website and never once do they mention specific heat capacity.
