('14+) Coolant, 11 years?? - Subaru Forester Owners Forum
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post #1 of 7 (permalink) Old 01-09-2017, 02:09 PM Thread Starter
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Coolant, 11 years??

I have a 2014 Forester (55k miles), and the coolant level is below the "low" line. But in the Forester owner's manual, it says that the Subaru Super Coolant that was in the car when it was new should last for 11 years or 100,000 miles. Is this a terrible estimate, or is there something wrong with my car that it's using coolant so much faster than that?

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post #2 of 7 (permalink) Old 01-09-2017, 02:59 PM
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I am not sure if you been checking it from the beginning because it is not unusual to have a drop in the level. Now the 100,000 miles/ 11 year is point where the integrity of the fluid meets manufacturers parameters not physical loss.

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Last edited by Yoda_One; 01-09-2017 at 04:05 PM.
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post #3 of 7 (permalink) Old 01-09-2017, 04:18 PM
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11 years/100k miles refers to the flushing/changing interval. That doesn't mean that you don't need to top off in between!
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post #4 of 7 (permalink) Old 01-09-2017, 04:22 PM
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A slight loss in coolant isn't unusual. Be sure to top it off with Subaru coolant and it will last a long time.

Do not top it off with water or different coolant.

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post #5 of 7 (permalink) Old 01-09-2017, 06:07 PM
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subaru uses an open system. There is no pressure cap on the overflow.
So you do lose some very slowly.

I lost between 4-8oz/year.

Fact: the overflow cap seals worse than the washer fluid cap.
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post #6 of 7 (permalink) Old 01-09-2017, 06:41 PM
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Quote:
Originally Posted by Rand View Post
subaru uses an open system. There is no pressure cap on the overflow.
So you do lose some very slowly.

I lost between 4-8oz/year.

Fact: the overflow cap seals worse than the washer fluid cap.
I don't recall ever seeing a pressure cap on the overflow on any car. Maybe I just never noticed ....
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post #7 of 7 (permalink) Old 01-09-2017, 07:00 PM
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Quote:
Originally Posted by RocketDawg View Post
I don't recall ever seeing a pressure cap on the overflow on any car. Maybe I just never noticed ....
They arent technically an overflow more of a reservoir but many use a closed system with a tank that has the pressure cap vs the radiator (some even have a cap on each but of course in that case the cap is just a regular cap on the radiator not a spring loaded one.

This is what I was referring to as a closed system.

You can see how the old school overflow type system(subaru) will have more evaporation loss.

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