00:00Three to five dollars a gallon. That's what most people pay for the bright blue windshield washer
00:04fluid. And the main freeze ingredient in a lot of it is methanol. The same alcohol that can blind
00:09you or kill you if someone drinks a mouthful. Billions of liters of that mix get sprayed on
00:14glass every year, then run off into gutters, soil, rivers, and lakes. I'm going to show you two mixes
00:19you can make in about five minutes that replace it completely. One for summer, one that stays
00:24liquid down around minus 50 Celsius, both without methanol, both dirt cheap compared to the jug at
00:29the gas station. Today I'll walk you through what's actually in the blue stuff. The exact
00:34summer recipe, the exact winter recipe, where to buy the ingredients, what to watch for so you don't
00:39freeze a line or wreck a finish, and how much money this actually saves if you drive a normal amount.
00:44Watch until the winter ratio. That's the part people under pour, and it's the difference between a clear
00:49windshield at minus 40 and a solid block of ice in your reservoir. I've been running the winter mix
00:53through real Canadian cold for months. I'm not going back to the blue jug. Here's what that blue
00:58liquid actually is. It's mostly water. A freeze point depressant, so it doesn't turn solid in
01:02January. A little detergent, so bugs and film let go of the glass. And usually a blue dye, so it
01:08looks
01:08official. The cheap winter versions lean on methanol because methanol is inexpensive and it hates
01:13freezing. That works for the car. It's a bad deal for everything else. Poison Control treats methanol
01:18washer fluid as a real household hazard. Pets drink from the puddle under the bumper. Kids get into open
01:24jugs in the garage. Spray it, and a chunk of whatever's in that reservoir is leaving your
01:28driveway and heading into the water system. There are over a billion cars and light vehicles on the
01:32road worldwide. Even a few liters per vehicle per year stacks into billions of liters of runoff.
01:37You're paying premium convenience store prices to mist a poison solvent onto glass so you can see the
01:43highway. You do not need methanol to do that job. What cleans a windshield is simple. Water to carry,
01:49a solvent to cut film and freeze low, and a tiny bit of soap so the liquid sheets instead of
01:54beating.
01:55Isopropyl alcohol, the rubbing alcohol on the pharmacy shelf, is the solvent. White vinegar
02:00cuts light haze and mineral film in warm weather. A teaspoon of liquid castile soap drops the surface
02:06tension so the wipers actually wipe. That's the whole formula. No special automotive chemistry,
02:11no blue dye required unless you want it, so nobody confuses the jug with drinking water.
02:15Freeze point is not a vibe. It's a ratio. Pure water locks up at 0 celsius.
02:2270% isopropyl alcohol freezes around minus 62. 91% sits near minus 73 to minus 75. 99% is
02:30colder still,
02:31so if you want protection near minus 50, the jug has to be mostly alcohol, not mostly water,
02:36with a polite splash of IPA. A weak mix will work in July and betray you the first hard frost.
02:42The winter recipe below is built for real cold, not for looking good on paper. Where to buy this,
02:47so you're not hunting specialty stores. Distilled water? Grocery store, usually under a dollar a jug.
02:54Clean tap is fine if your water isn't heavy with minerals. White vinegar, same aisle, cheap.
02:59Liquid castile soap, Dr. Bronner's or a store brand, pharmacy or grocery. You need teaspoons,
03:04so one bottle covers a year of batches. Isopropyl alcohol, pharmacy or big box.
03:10For winter, grab 91 or 99% if you can find it. 70% still works if you barely dilute
03:16it.
03:16Skip the scented gel, hand rub junk. Skip anything that lists methanol.
03:20Summer gallon cost often lands under a dollar if you already have vinegar and soap in the house.
03:25Winter costs more because alcohol is most of the volume, still usually well under name brand deep freeze fluid
03:30once you price it per liter. And you're not paying for marketing in blue dye.
03:34Summer recipe. Makes about 4 liters.
03:37One standard gallon jug. Take a clean, empty gallon jug. Pour in about 3 and 3 quarter liters of water.
03:43Add half a cup of white vinegar. Add one teaspoon of liquid castile soap.
03:48Teaspoon? Not a glug of dish soap that foams like a car wash.
03:51Optional? Two drops of food coloring so it's obviously not a drink.
03:55Cap it. Tip it gently, eh? A few times.
03:57Don't shake it into a bubble bath. Open the hood. Pop the washer cap with the windshield icon and pour
04:02it in.
04:03Five minutes. Done.
04:05What that mix is doing. Water carries. Vinegar cuts. Light film and spots.
04:10Castile makes it sheet so the blades don't smear. Warm months don't need a jug full of alcohol.
04:15Save that bottle for winter.
04:16And winter recipe. Same gallon jug. Built to stay liquid near minus 50 Celsius.
04:22This is the ratio people cheap out on.
04:24For serious cold, use about 3 liters of 99% isopropyl alcohol and 1 liter of water.
04:31Only have 91%? Push closer to 3 and a half liters alcohol and half a liter water.
04:36Only have 70%? Use it nearly straight with a small water top-up.
04:41And the soap? 70% already freezes around minus 62.
04:44So you're in the window.
04:45Add 1 teaspoon Castile soap.
04:48Optional coloring.
04:49Gentle mix.
04:50Write on the jug in big letters.
04:52Washer fluid.
04:53Do not drink.
04:55That alcohol bulk is why it won't freeze when a cheap blue jug rated to minus 20 turns into a
05:00popsicle.
05:01Factories buy Freeze Point with methanol percentage.
05:03You're buying it with isopropyl percentage instead.
05:06Same job. Different bottle. No methanol story.
05:09If you're still here, quick pause.
05:11Subscribe if you haven't.
05:12Free. And it actually helps me keep making these.
05:15Members get the videos that never hit the public feed.
05:18The builds and tests I'm still running before they're ready for everyone.
05:21Back to the jug.
05:22A few things worth knowing before you pour.
05:24Isopropyl burns.
05:25Mix outside or in a ventilated garage.
05:28Keep it away from sparks and pilot lights.
05:30Store it sealed and labeled.
05:32Safer than methanol is not the same as harmless.
05:34Don't drink it. Don't leave it where a kid or a dog can get into it.
05:37If the reservoir still has old blue fluid in it,
05:39run the new mix through until the spray comes out clear so you're not diluting your freeze protection with leftovers.
05:45In deep cold, a weak mix freezes in the lines and can stress the washer pump.
05:49If minus 30 is a normal Tuesday where you live, do not underpour the alcohol.
05:54Keep summer vinegar at that half cup level.
05:56A 50-50 vinegar bomb every day is harder on wax and some rubbers than you want.
06:00And if your owner's manual is extremely picky about approved fluid only, glance at it.
06:04For a normal washer bottle, this is the same category of mix people have run for years.
06:09Money, in plain numbers.
06:11Store fluid.
06:12Call it $3-5 a gallon for decent winter juice.
06:14More for the deep-free stuff and the tiny bottles at gas stations.
06:18Two cars, going through 8-12 gallons a year is roughly $25-60 annually before road trip panic buys.
06:25Summer DIY.
06:26But about $1 a gallon is almost nothing.
06:29Winter DIY costs more per batch because of the alcohol, but still usually beats specialty winter brands when you buy
06:35isopropyl in larger bottles.
06:37Over five years, that's real grocery money.
06:39And every liter you don't spray is a liter of methanol mix that didn't hit the ditch.
06:44The whole thing in one line.
06:46Washer fluid is water.
06:47Something that won't freeze.
06:48And a little detergent.
06:50That's it.
06:51You can mix it on a counter with a funnel and a measuring cup.
06:53How a normal person does this on a Saturday.
06:56Empty jug.
06:57Funnel.
06:57Measuring cup.
06:59Pharmacy run.
07:00For one big bottle of 91 or 99% isopropyl if winter is coming.
07:05Mix the summer batch now.
07:07Mix the winter batch when the forecast drops.
07:09Pop the hood.
07:10Fill the reservoir.
07:11Spray test the nozzles before you drive off so you know nothing's clogged.
07:15Got a second car or cabin beater?
07:17Make a second jug.
07:18Label it.
07:19Leave it in the trunk.
07:20Faster than standing in the auto aisle comparing freeze point labels.
07:23Same summer mix in a small spray bottle also cleans interior glass and mirrors without the ammonia cloud some blue
07:29cleaners throw.
07:30Keep the heavy winter mix for the reservoir.
07:32No need to stink up the cabin with that much alcohol.
07:34If you've got a driveway in a pharmacy nearby, you can stop buying the blue jug this weekend.
07:39Summer recipe for bug season.
07:41Winter recipe when the thermometer falls through the floor.
07:44Methanol stays on the shelf.
07:45Money stays in your pocket.
07:47A little less bright blue runoff in the water.
07:51If this saves you a few jugs this year, send it to someone still buying the blue stuff.
07:55See you in the next one.
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