Aftermarket Coolant Type - Subaru Forester Owners Forum
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post #1 of 12 (permalink) Old 02-27-2010, 10:07 AM Thread Starter
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Aftermarket Coolant Type

I have a 2005 forester X with the factory green coolant that is due to be changed. I have purchased prestone extended life antifreeze that claims to be safe with all vehicles and aluminum engines. I plan to add the required subaru conditioner as well and use distilled water in a 50/50 mix. The prestone antifreeze is phosphate and borax free so I am assuming it is the same quality green stuff that subaru sells. Am I safe with this antifreeze or is there something unique with the subaru green stuff and a reason to buy that instead?
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post #2 of 12 (permalink) Old 02-27-2010, 10:42 AM
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Many here will tell you to use only the Subaru coolant. To my surprise, when I had the coolant changed last summer, my trusted Subaru dealership shop used Shellzone coolant with the Subaru conditioner. They also added Red Line WaterWetter.

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]

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Last edited by 2.5x_sleeper; 06-25-2014 at 09:05 PM.
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post #3 of 12 (permalink) Old 02-27-2010, 11:00 AM
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With all the paranoia regarding head gaskets failures, I use Subaru coolant. I also added conditioner from the dealership per their suggestion, I checked with an experienced local Subaru shop and they approved of it.

Stan

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post #4 of 12 (permalink) Old 02-27-2010, 11:06 AM
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$28 per bottle Subaru coolant will not save a poorly designed headgasket from failing.
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post #5 of 12 (permalink) Old 02-27-2010, 11:42 AM
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Quote:
Originally Posted by Atomic1 View Post
$28 per bottle Subaru coolant will not save a poorly designed headgasket from failing.
Agreed, but I think the reason most members say to use only Subaru coolant is for the warranty issue. If the head gasket fails, less BS to deal with.

As I posted earlier, my trusted Subaru dealership shop used Shellzone plus the Subaru conditioner & not the Subaru coolant. I don't think a Subaru dealership shop wouldn't use something that could be a problem down the road for them.

Bobby...
['07 FSXT MODding Journal] ['03 X MODding Journal]

'07 FSXT - COBB Surgeline dyno Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport

Last edited by 2.5x_sleeper; 06-25-2014 at 09:05 PM.
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post #6 of 12 (permalink) Old 02-27-2010, 11:58 AM
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Quote:
Originally Posted by 2.5x_sleeper View Post
Agreed, but I think the reason most members say to use only Subaru coolant is for the warranty issue. If the head gasket fails, less BS to deal with.

As I posted earlier, my trusted Subaru dealership shop used SHELLZONE plus the Subaru conditioner & not the Subaru coolant. I don't think a Subaru dealership shop wouldn't use something that could be a problem down the road for them.

Bobby...

My MODding Journal
I'm not sure that shellzone actually satisfies the warranty requirements. Unlike the subaru and prestone coolants which are 0 silicate, the shellzone is just "low silicate". Peak coolant is also "low silicate". Not sure what effect that would have however.

04xt/4eat, 16g, STI bits and bobs
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post #7 of 12 (permalink) Old 02-27-2010, 12:17 PM
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Quote:
Originally Posted by md1814 View Post
I have purchased prestone extended life antifreeze that claims to be safe with all vehicles and aluminum engines. ?
Just make sure it is not a DexCool clone. If it is DO NOT USE IT

Be careful what you wish for.
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post #8 of 12 (permalink) Old 02-27-2010, 12:38 PM
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As so many others have said, I stick with the factory coolant and the factory filters just to avoid any hassle if something breaks under warranty.

I can't imagine an aftermarket supplier going to bat with Subaru for you if Subaru said their product caused a problem.

Larry D
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Until I Retire - then its back to Subaru
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post #9 of 12 (permalink) Old 02-27-2010, 12:39 PM Thread Starter
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It's not the DEXCool type. I think i'm safe using the Prestone extended life coolant. When I go to the dealer later to pick up the coolant conditioner i'll ask what they think ..... but i'm sure I know what they will say. But who knows, they have been pretty straight forward and honest with me so far. Also, although this coolant is rated for 5 years 150K miles, I'll be changing it every other year along with the conditioner seeing as I don't put that many miles on my car. Maybe i'm a bit paranoid but coolant is cheap so why take any chances and I figure the additional installions of the subaru conditioner will help prevent any future HG issues.
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post #10 of 12 (permalink) Old 02-27-2010, 02:14 PM
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I'm so paranoid about the headgasket issue from reading about all these failures, I think I'm going to request that I get to 'physically witness' unopened, seal intact, original subaru coolant and unopened conditioner being placed in my vehicle when its serviced. Its not healthy to be this paranoid! LOL! ;)

2008 Forester 2.5
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post #11 of 12 (permalink) Old 02-27-2010, 02:22 PM
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Quote:
Originally Posted by oak_park View Post
I'm so paranoid about the headgasket issue from reading about all these failures, I think I'm going to request that I get to 'physically witness' unopened, seal intact, original subaru coolant and unopened conditioner being placed in my vehicle when its serviced. Its not healthy to be this paranoid! LOL! ;)
I had my coolant changed at a large Subaru dealership shop. I figured I should have some of the same coolant at home so I could top up the coolant level. The parts guy brings out a gallon of Shellzone coolant (concentrate). I asked if that was the correct coolant for my '03 & '07 Forester? He said it's the only green coolant they use at the shop.

Bottom line. Do you really know what coolant was used?

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]

'07 FSXT - COBB Surgeline dyno Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport

Last edited by 2.5x_sleeper; 06-25-2014 at 09:06 PM.
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post #12 of 12 (permalink) Old 02-27-2010, 02:49 PM
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Coolants purchased at local parts stores now-a-days are compatible with other coolant types. I would think that if a coolant changeover is done, any of the top tier coolants would serve you well.
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