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#4634653 - 01/14/18 12:50 PM Is -25F rated washer fluid good enough?
Patman Offline



Registered: 05/27/02
Posts: 20341
Loc: Oakville, Ontario
When I was at a Walmart in Niagara Falls NY a few weeks ago I noticed that they sell the -25F rated washer fluid for only around $2, so I picked up a couple of jugs. I'm wondering if anyone else uses this stuff and does it actually work well or do you find that it's not as good below 0F as the other kinds? I don't ever recall it getting down to -25F here, but it has gone below -10F a few times in recent memory. Will I be ok in my climate using this stuff?
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#4634658 - 01/14/18 12:57 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 6172
Loc: USA
It will be fine. It's the lowest temp stuff you can find at a good price without the Rain-X, and it's a pretty purple color too smile

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#4634661 - 01/14/18 12:59 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
BJD78 Offline


Registered: 08/05/17
Posts: 493
Loc: Nebraska
Growing up in fargo ND back in the 60's and 70's, my dad (now long ago deceased) used to always dump in a bottle of drug store alcohol in to the washer fluid reservoir every winter. He added it to the blue stuff which is good to -25. Not sure how much lower it could go with the alcohol, but I know we had at least a few days in the -30 or more range and I dont think the fluid ever froze up. I use the blue stuff and it has never dropped below -25 here as far as I know. For the most part we only use the washer fluid when temps are above about +20 anyway and salt spray and slush needs to be washed off.
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#4634662 - 01/14/18 01:01 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
Warstud Offline


Registered: 09/02/05
Posts: 5397
Loc: MIchigan
I would just use it but check the reservoir in 24 hrs to make sure it hasn't froze or gotten slushy. You can always add isopropyl alcohol to lower the freezing point.

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#4634667 - 01/14/18 01:03 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
skyactiv Offline


Registered: 03/02/13
Posts: 4398
Loc: The Midwest
I snapped a pic for a post on this site last year:

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4369784/Re:_ISO_Heet_and_Pink_Windshie



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#4634669 - 01/14/18 01:06 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
HoosierJeeper Offline


Registered: 11/23/16
Posts: 1276
Loc: WI
It freezes on me once it's about -10F out, with the Walmart blue -20F. So that stuff might freeze at -15F or so.


Edited by HoosierJeeper (01/14/18 01:07 PM)
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#4634670 - 01/14/18 01:07 PM Re: Is -25F rated washer fluid good enough? [Re: Warstud]
Patman Offline



Registered: 05/27/02
Posts: 20341
Loc: Oakville, Ontario
Originally Posted By: slacktide_bitog
It will be fine. It's the lowest temp stuff you can find at a good price without the Rain-X, and it's a pretty purple color too smile


Actually it's pink.


Originally Posted By: Warstud
I would just use it but check the reservoir in 24 hrs to make sure it hasn't froze or gotten slushy. You can always add isopropyl alcohol to lower the freezing point.


I have been keeping the jugs of this stuff in the trunk of my Civic and haven't noticed it getting slushy during our coldest nights. I just wonder if it'll completely freeze over once I spray it on the windshield on a cold morning.

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#4634696 - 01/14/18 01:41 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
dlundblad Online   happy


Registered: 09/30/13
Posts: 10044
Loc: Indiana
In the spray form, the alcohol may evaporate out and leave your windshield appearing frosty.

It won't freeze if just sitting in a jug.
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#4634697 - 01/14/18 01:43 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2604
Loc: Cedarbrae, Ontario
Originally Posted By: Patman
When I was at a Walmart in Niagara Falls NY a few weeks ago I noticed that they sell the -25F rated washer fluid for only around $2, so I picked up a couple of jugs. I'm wondering if anyone else uses this stuff and does it actually work well or do you find that it's not as good below 0F as the other kinds? I don't ever recall it getting down to -25F here, but it has gone below -10F a few times in recent memory. Will I be ok in my climate using this stuff?
It was -22F here back a week or so ago.
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#4634708 - 01/14/18 01:55 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
Drew99GT Offline


Registered: 10/11/02
Posts: 22128
Loc: Colorado Springs
I'm using that pink Supertech fluid currently. Meh, it's OK. It will clear the windshield but it tends to leave a very fine layer of frost when it's really cold. For the price though, it's good enough.

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#4634732 - 01/14/18 02:18 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
Rolla07 Offline


Registered: 11/05/11
Posts: 4737
Loc: MTL, CANADA
I use local stuff that claims -40 celsius. Ive used it to -30 celsius with no issues. I have also used -25 F fluid with no issues. I doubt you will have any issues.
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#4634742 - 01/14/18 02:28 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
irv Online   content


Registered: 10/08/06
Posts: 1073
Loc: Oshawa, Ont. Canada
Originally Posted By: Patman
When I was at a Walmart in Niagara Falls NY a few weeks ago I noticed that they sell the -25F rated washer fluid for only around $2, so I picked up a couple of jugs. I'm wondering if anyone else uses this stuff and does it actually work well or do you find that it's not as good below 0F as the other kinds? I don't ever recall it getting down to -25F here, but it has gone below -10F a few times in recent memory. Will I be ok in my climate using this stuff?


I'm surprised you purchased that, Patman, (despite the cheap cost) considering the temps we have seen here lately. Experience tells me nothing less that -40 -45 for our winters, even though, until this year, we haven't had hardly any winters.

Costco sells, on sale, occasionally, 4 jugs of their brand for $8.50, which is -45 rated. I am unsure if it is the best I have ever used, but so far so good as far as freezing goes. Keep your eyes out for it and stock up when you see it. cheers
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#4634771 - 01/14/18 03:12 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
car51 Online   content


Registered: 03/12/15
Posts: 10257
Loc: Southwest PA
I was using the pink ST fluid. This morning the stuff froze in one line. frown
It was -7F this morning at 7:00 a.m. BTW


I spent 20 minutes heating the lines and cleaning goo out of nozzles. Put some safety kleen fluid in from work so all good now


Next time I'll use Prestone stuff


Edited by car51 (01/14/18 03:13 PM)
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#4634783 - 01/14/18 03:23 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
If we're talking about the Supertech house brand, the blue dye in there will clump up and clog your washer pump. Blue and green mixes are affected. If you don't believe me, leave a jug in your garage for a few months and look inside. You'll find blue stringy clumps of dye.

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#4634798 - 01/14/18 03:32 PM Re: Is -25F rated washer fluid good enough? [Re: Patman]
Kestas Offline



Registered: 06/04/02
Posts: 12339
Loc: The Motor City
I once had to deal with the cloudy mess. This is harder to diagnose with modern cars since they now bury the washer bottle under everything.

When I get clog issues, I disconnect the system and reverse flush all the lines, then drain the bottle and flush it out.

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