Coolant Change Interval...30 months?? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 8 (permalink) Old 12-10-2008, 11:59 AM Thread Starter
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Coolant Change Interval...30 months??

2006 Jeep Commander. 3.7L 4x4. Bought used from Carmax. 22,000 miles currently.

OK. I was at a Jiffy Lube and they said my coolant was reading as only about 35% and the PH was high. Whatever that means.

He recommended a change. Of course!!!

Has anyone changed coolant yet? Mine looks clean and happy. Never had a problem overheating, but I've only had this Jeep since July. My first winter (chicago) is now. I always think the JL guys try to upsell and I say no. I only go there for an oil change.

Anyone? Thanks in advance....

AR
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post #2 of 8 (permalink) Old 12-10-2008, 12:39 PM
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its supposed to be good for 100K miles.
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post #3 of 8 (permalink) Old 12-10-2008, 02:10 PM Thread Starter
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So how would I test it? The tech guy at JL used a litmus paper of some kind. Maybe that was the wrong thing to use for a test?? Is the coolant the same as traditional coolant?

Thanks...

AR
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post #4 of 8 (permalink) Old 12-10-2008, 02:11 PM
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no. its different coolant. i would call your jeep dealer and ask about testing it.
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post #5 of 8 (permalink) Old 12-10-2008, 02:43 PM
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Quote:
Originally Posted by Get Lost 4X4 View Post
its supposed to be good for 100K miles.
The owner's manual says 60K miles OR 100k km, based on here: http://www.jeep.com/en/owners/manuals/index.html
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post #6 of 8 (permalink) Old 12-10-2008, 02:59 PM
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Anybody know where to get the OEM coolant (the red stuff) besides the dealer ?

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post #7 of 8 (permalink) Old 12-10-2008, 10:18 PM
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Yes, Prestone makes an orange coolant that meets GM & Chrysler specs, you cna buy it at most parts stores.

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post #8 of 8 (permalink) Old 12-11-2008, 07:38 AM
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The litmus test is the most valid and I,ve used it for years.
However, that ph/35% line was a crock of B/S.
The litmus test is just that, a color change on paper. It is 3 stages, New, PH rising, and PH excessive.
PH rising on a now 3 year old vehicle w/dexcool (red stuff) is normal for the coolants age.
I personally think 5 years is a bit excessive, so I subscribe to a 4 year interval.
As long as your freeze protection is -25, I would leave it be till next summer.
You can get the coolant at any parts store and I,ve begun using the pre-mix. Yeah, I know I,m paying for water, but it is de-ionized. I grew tired of mixing my own so this is quite convienent.

Your question, my opinion,
Rob
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