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#4529490 - 09/29/17 03:07 PM Coolant change Interval
BigD7 Offline


Registered: 10/15/10
Posts: 48
Loc: NY
Hi all, 2010 5.7 commander here. Did a radiator dump and refill in 2014 and again in 2015. Was about to do it again but started wondering whether it's overkill. Do I do it or wait another yr? Using mopar long life coolant. Thanks in advance.

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#4529491 - 09/29/17 03:10 PM Re: Coolant change Interval [Re: BigD7]
Eddie Online   sleepy


Registered: 12/07/03
Posts: 9567
Loc: Florida, Cape Coral
The long-life coolant in my Mazda is 10 year 120,000 miles. I think most long-life is at least 5 year 75,000 miles. Ed
_________________________
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#4529494 - 09/29/17 03:14 PM Re: Coolant change Interval [Re: Eddie]
BigD7 Offline


Registered: 10/15/10
Posts: 48
Loc: NY
Thanks Eddie. Yes, this one is 5 yrs 100K miles. I'm just wondering since I'm doing the radiator only, whether more frequent changes r needed.

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#4529502 - 09/29/17 03:34 PM Re: Coolant change Interval [Re: BigD7]
WobblyElvis Offline


Registered: 09/23/14
Posts: 1345
Loc: Toronto Canada
Been maintaining older cars for the past 45 years. In the past 20 years the coolant has advanced significantly and I find a rad flush and new fluid is not necessary at all. I don't know how they do it but it is far better than it used to be. In my experience going 10 years on the original fluid is very doable. If I kept a new car 20 years, I would only expect to service the cooling system fluid once and that's it.

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#4529508 - 09/29/17 03:40 PM Re: Coolant change Interval [Re: WobblyElvis]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Originally Posted By: WobblyElvis
Been maintaining older cars for the past 45 years. In the past 20 years the coolant has advanced significantly and I find a rad flush and new fluid is not necessary at all. I don't know how they do it but it is far better than it used to be. In my experience going 10 years on the original fluid is very doable. If I kept a new car 20 years, I would only expect to service the cooling system fluid once and that's it.


Agreed. With the old plain green coolant, I never had a corrosion issue with a radiator drain and refill every 2 years.

With the new fluids, you could likely do the same every 4-5 years and be well protected.
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Thick vs Thin test: 15k / 43k miles complete

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#4529510 - 09/29/17 03:45 PM Re: Coolant change Interval [Re: BigD7]
rollinpete Offline


Registered: 03/20/17
Posts: 457
Loc: West Ma.
This is a inexpensive tester Maybe an overkill but I do mine every 2 years I check it with this... 1 gallon antifreeze the rest water...Ive' never had a antifreze relateded problem in over 30 plus years...


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Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive183k miles
Last Change;
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Fram xg8a, Fram CA8141

(Oil) Where would we be with out it.


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#4529517 - 09/29/17 03:49 PM Re: Coolant change Interval [Re: BigD7]
ZebRuaj Offline


Registered: 10/14/16
Posts: 153
Loc: MN
I service per manual (usually as I near 100k). If the engine drains aren't a PIA to reach, I'll do them. If not, rad drain and fill is good enough if the car has no prior cooling issues.

If I want more alone time in the garage, I usually find other "maintenance" stuff for excuses.
_________________________
~Shade tree mechanic for friends and family.

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#4529518 - 09/29/17 03:49 PM Re: Coolant change Interval [Re: BigD7]
HoosierJeeper Offline


Registered: 11/23/16
Posts: 1276
Loc: WI
Make sure to use HOAT coolant (such as Zerex G05) in your Jeep! Flush it ASAP if it's OAT stuff like universal.

With HOAT, probably every 5-7 years is good. Mileage, probably up to about 100k.
_________________________
15 Jeep KL Limited V6: Formula Shell 5W20
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#4529578 - 09/29/17 04:55 PM Re: Coolant change Interval [Re: BigD7]
Gebo Online   content


Registered: 09/18/02
Posts: 2115
Loc: VA
Id find the engine drain plugs and open them. Oh, and make sure you have the temp knob turned to hottest temp.
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'98 LEX LS400 280K
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'06 Toyota Highlander 145K
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#4529615 - 09/29/17 05:30 PM Re: Coolant change Interval [Re: BigD7]
DBMaster Offline


Registered: 09/18/12
Posts: 5323
Loc: DFW
I've been adding RMI-25 every 15,000 miles and don't ever plan to change mine.

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#4529675 - 09/29/17 06:30 PM Re: Coolant change Interval [Re: BigD7]
eljefino Offline


Registered: 06/15/03
Posts: 32637
Loc: ME
What does your manual say to do? Mine literally says drain the radiator, not squeeze every drop out.

I hate to parrot the "cheap insurance" bit but most cars are junked due to transmission or cooling issues. And if you read here about all the 12-15 year old cars with $1000 heater core problems etc, you don't want that to be you. And it takes all those years to show issues.

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#4529688 - 09/29/17 06:43 PM Re: Coolant change Interval [Re: BigD7]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
Sounds like your coolant is basically all new as of 2015, so long life coolant = 5+ years = theoretically change it in 2020.

(I am an obsessive coolant changer, so I have never let a car go 5 years with any sort of coolant.)

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#4529771 - 09/29/17 07:51 PM Re: Coolant change Interval [Re: BigD7]
Eddie Online   sleepy


Registered: 12/07/03
Posts: 9567
Loc: Florida, Cape Coral
Change the coolant with a long life coolant every 4 years with a radiator flush only. 5 years is probably fine but, 4 years is a compromise to help people sleep better. Ed
_________________________
CX5 Touring 2.5L :-)

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#4529772 - 09/29/17 07:51 PM Re: Coolant change Interval [Re: BigD7]
barkingspider Offline


Registered: 12/22/13
Posts: 2049
Loc: socal
If I were you, I would not change the coolant until 2020 or another 100k miles.
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06 Cadillac Escalade Ext
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#4529812 - 09/29/17 08:41 PM Re: Coolant change Interval [Re: BigD7]
Kage860 Offline


Registered: 04/17/17
Posts: 88
Loc: NY
Jeep coolant is good for 5 years. So if the radiator drain changes half the coolant you could do that every 2.5 years and be ok based on my logic.
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2007 Jeep Liberty

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