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Discussion Starter #1 (Edited)
Add 16oz of Isopropyl Alcohol to 1 gallon of Windshield Washer fluid, this keeps it from freezing. Do this around 1 month before it starts freezing outside and keep adding this every time you fill up all Winter long.

I use an empty gallon and fill it 1/2 way so I have 2 gallons that are 1/2 full and then add 1/2 bottle of Isopropyl Alcohol to each 1/2 gallon.

awww.chemistryland.com_CHM107Lab_Exp10_pHindicator_Lab_RubbingAlcohol.jpg


 

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Discussion Starter #2
Oh I forgot to say sometimes it smells like booze outside the car or when you squirt the windows, I think it depends on the fluid you buy cause I dont get this smell all the time.

This modification is really best for vehicles with rear window washers.

My 1998 Explorer and Windstar used to freeze up all the time, since I do this every Winter I have had zero issues!
 

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"Oh I forgot to say sometimes it smells like booze outside the car or when you squirt the windows"

Ever get pulled over for DWI after washing the windows.........lol
 

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I have had the cheap blue stuff freeze on me, but of the dozens I've used over the years, that is a rare occurance, and for the most part, I don't think that they protect to the advertised temperature.

My daughter on the other hand likes to use the RainX line of products, yeah they are double the price but it has never frozen on her.

Rain-X®: De-Icer Windshield Washer Fluid

They advertise that their de-Icer protects to -25 F.

 

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Discussion Starter #8
Yeah i dont see what you do. I see a link posted that I will delete though.

that is what I do to keep mine from freezing...
@^#*(&#(^&.com
 

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yeah. i have some purple stuff that's rated -35, but it is some good information
 

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Hey Mark V You are buying washer fluid then your Isopropyl Alcohol may ask why you won't just buy washer fluid with it in it already for like 2 dollars a gallon? and it is good for -40....
 

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Whoops, a little late to the party for this thread BUT....I fing this home brew deicer amusing...and a waste of money.
A 16oz bottle of 70% isopropyl alcohol is $2.25, a bottle of Walmarts house brand windshield fluid rated for -20° is $1.60. First, minus 20° is extremely cold and rare when the ambient temps get that low....I'm along the Illinoiz/Wisconsin state line, it gets really nasty at times during the winter yet we can go many years at a stretch without ever seeing it that cold even for a brief hour peak as the over night low, that said "do you really need more???" And that said, and this is where I suspect some of you have had problems with the fluid freezing, is that not all blue washer fluid is a de-icer. A lot of it is simply a cleaning solution for 32° and up. Pay attention to the label of what your grabbing off the shelf. Most often the only difference (within the same brand) is just the number of how low it's good until. I almost made that mistake, grabbed a couple bottles and threw them in the cart. At the check out putting them on the belt side by side I just happen to catch it, one had -20º the other 0º, no different colors, no different designs. Why they make the two, I haven't a clue! In the summer I see the same brand/label with a +30º.
OK so now you figure you'll play junior alchemist and mix up a batch with rubbing alcohol, so you waste time with pouring from one bottle to another, try and keep things pretty much measured right, hopefully you didn't spill and make a mess. Then you have to do this each and every time you run out. Much much easier and a no brainer to grab a bottle of the -20° or in the extremely rare instance you need more get the ready to go -35° juice. Yeah that stuff is usually more per gallon BUT when you get even the cheaper stuff at $1.60 a jug and add a pint of rubbing alcohol at $2.25 (at least) you bumped your cost to roughly $3.50 a gallon. You gain absolutely nothing with this home brew stuff, maybe even waste some money, definitely wasted time and effort.
 

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"Oh I forgot to say sometimes it smells like booze outside the car or when you squirt the windows"

Ever get pulled over for DWI after washing the windows.........lol
I don't know what you drink but rubbing alcohol sure doesn't smell like any drinking alcohol I ever smelled.
 

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I still have the cheap blue stuff from Walmart in the Corolla... I've never had any freezing issues in either car. Just switched over to Rain X 2-in-1 de-icer + bug wash (orange-reddish color) in the van. I am waiting for the blue stuff to run out in the Corolla so I can switch that over as well.

I did have to thaw out the defroster lines and tank in the Sienna... The fluid looked blue, but I think my dad might have watered it down this past fall... Fresh blue stuff seemed to cure that issue.
 
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