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#4663411 - 02/11/18 10:40 PM Coolant change time or mileage
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4848
Loc: Houston, Texas
I don't reach the 100,000 mile mark before 5 years. Is the pink mopar HOAT coolant done after 5 years? I changed it initially around 5 years and like 83,000 miles. I'm at 10 years and 123,000 now.
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2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4663440 - 02/11/18 11:22 PM Re: Coolant change time or mileage [Re: motor_oil_madman]
Kage860 Offline


Registered: 04/17/17
Posts: 88
Loc: NY
Generally long life coolant is good for 5 years. I figure coolant is more sensitive to time than miles per se.
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2007 Jeep Liberty

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#4663472 - 02/12/18 01:02 AM Re: Coolant change time or mileage [Re: motor_oil_madman]
Nyogtha Offline


Registered: 10/13/14
Posts: 2323
Loc: San Antonio, TX
I changed the factory fill orange G05 HOAT in my 2012 Ram last year when I hit the 5 year mark. I had 46K miles on the truck at that time. I want this truck to last and the price of Zerex G05 at AAP after discount code (when not on some lousy $2 off a gallon sale) isn't prohibitive IMO. I did not do any analysis on my used coolant.

I found the Mopar HOAT MS-9769 pricing to be significantly higher than Zerex G05 so I went with Zerex. It's a light gold / yellow dyed coolant but also MS-9769.

Personally I think hot weather driving in Texas beats up coolant chemistry worse / faster than cold weather driving in more northern climates. The good old Arrehnius equation.
_________________________
"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

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#4663475 - 02/12/18 01:16 AM Re: Coolant change time or mileage [Re: motor_oil_madman]
CharlieBauer Offline


Registered: 03/29/16
Posts: 1177
Loc: CA
Valvoline told me the life of coolant in the bottle is also 5 years.

It's a good idea to check the date code through your smartphone when picking up coolant in store.
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It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

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#4663476 - 02/12/18 01:48 AM Re: Coolant change time or mileage [Re: motor_oil_madman]
Nyogtha Offline


Registered: 10/13/14
Posts: 2323
Loc: San Antonio, TX
The PI sheet for Zerex G05 shows a shelf life of 3 years.


https://sharena21.springcm.com/Public/Do...12-ac162d889bd1

So I always check the date code and I don't stock up too early.
_________________________
"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

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#4663659 - 02/12/18 09:20 AM Re: Coolant change time or mileage [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4848
Loc: Houston, Texas
I notice the thermostat starts getting laggy after 5 years or so. Gets slow to warm up.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4663759 - 02/12/18 10:40 AM Re: Coolant change time or mileage [Re: motor_oil_madman]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1709
Loc: Alberta
Every 5 years and you won’t have problems.

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#4663832 - 02/12/18 11:35 AM Re: Coolant change time or mileage [Re: motor_oil_madman]
The_Nuke Offline


Registered: 07/21/13
Posts: 288
Loc: D/FW Metroplex
Originally Posted By: motor_oil_madman
I don't reach the 100,000 mile mark before 5 years. Is the pink mopar HOAT coolant done after 5 years? I changed it initially around 5 years and like 83,000 miles. I'm at 10 years and 123,000 now.


IMO it is best to treat the coolant life expectancy claims like the manufacturers treat their new car warranties - xx miles/x years, whichever comes first. So if the coolant sees its 5th birthday before it sees its 100,000th mile, change it.

Allowing it to go beyond 5 years in order to reach the 100K mile mark is a recipe for disaster IMO, especially considering the severe operating environment your geographical location imposes.

(My position on this subject was recently bolstered by personal experience with factory fill Mopar HOAT coolant that was allowed to go beyond the 5 year mark even though it had not yet been in service 100K miles. There were clumps of brown goo left behind in the overflow tank and what looked like sand particles filtered out of the drained coolant when transferring from drain pan to collection jug.)
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2012 Dodge Charger
- R/T with pursuit pkg.
- 5.7L + A5 + 2.65
"..it's got cop tires, cop shocks, cop suspension..."

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