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Coolant change time or mileage #4663411
02/11/18 11:40 PM
02/11/18 11:40 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant change time or mileage [Re: motor_oil_madman] #4663440
02/12/18 12:22 AM
02/12/18 12:22 AM
Joined: Apr 2017
Posts: 94
NY
Kage860 Offline
Kage860  Offline
Joined: Apr 2017
Posts: 94
NY
Generally long life coolant is good for 5 years. I figure coolant is more sensitive to time than miles per se.


2007 Jeep Liberty
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663472
02/12/18 02:02 AM
02/12/18 02:02 AM
Joined: Oct 2014
Posts: 2,408
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,408
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
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663475
02/12/18 02:16 AM
02/12/18 02:16 AM
Joined: Mar 2016
Posts: 1,226
CA
CharlieBauer Offline
CharlieBauer  Offline
Joined: Mar 2016
Posts: 1,226
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.


It ain't what you don't know that gets you into trouble. It's what you know for sure that ain't so.

- mistakenly attributed to Mark Twain
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663476
02/12/18 02:48 AM
02/12/18 02:48 AM
Joined: Oct 2014
Posts: 2,408
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,408
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
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663659
02/12/18 10:20 AM
02/12/18 10:20 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.

Re: Coolant change time or mileage [Re: motor_oil_madman] #4663759
02/12/18 11:40 AM
02/12/18 11:40 AM
Joined: Dec 2017
Posts: 2,307
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,307
SE British Columbia, Canada
Every 5 years and you won’t have problems.


If you want the job done right......do it yourself.
Re: Coolant change time or mileage [Re: motor_oil_madman] #4663832
02/12/18 12:35 PM
02/12/18 12:35 PM
Joined: Jul 2013
Posts: 349
D/FW Metroplex
The_Nuke Offline
The_Nuke  Offline
Joined: Jul 2013
Posts: 349
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.)


2012 Charger Pursuit aka "The Bacon Hauler"
- 5.7L + NAG1 (A5) + 2.62 (215mm)
Re: Coolant change time or mileage [Re: motor_oil_madman] #4863874
09/08/18 10:43 PM
09/08/18 10:43 PM
Joined: Aug 2018
Posts: 198
N.A.
Onetor Offline
Onetor  Offline
Joined: Aug 2018
Posts: 198
N.A.
Don't forget that coolant also lubricates the Water Pump etc. So the additives need to be replenished, etc. I agree about the heat being detrimental!

Re: Coolant change time or mileage [Re: Nyogtha] #4870402
09/16/18 06:14 PM
09/16/18 06:14 PM
Joined: Oct 2014
Posts: 11,819
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,819
Idaho
Originally Posted by Nyogtha
The PI sheet for Zerex G05 shows a shelf life of 3 years.


https://sharena21.springcm.com/Publ...bd3/c264d227-0dbd-e711-9c12-ac162d889bd1

So I always check the date code and I don't stock up too early.
Where does it show the shelf life?


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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