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#4634215 - 01/14/18 04:41 AM Question - what does 0C (32F) mean to automobiles
Shannow Offline


Registered: 12/12/02
Posts: 39858
Loc: 'Stralia
Yep, that's the freezing point of water, which is now an obsolete coolant, not having been specified for decades that I'm aware of.

But what line in the sand does 0C actually define for automobiles ?

"below freezing" is mentioned as a point in which "things" change in their behaviour, but what's the change ?

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#4634216 - 01/14/18 04:47 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
Nick1994 Online   content


Registered: 02/19/13
Posts: 10108
Loc: Phoenix, AZ
It means the poor thing is out there shivering, hurry up and give it a blanket!
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#4634218 - 01/14/18 04:53 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
Garak Offline


Registered: 12/05/09
Posts: 24574
Loc: Regina, Saskatchewan, Canada
Not much, in my view. I run washer fluid year round that won't freeze until -45 C, and I certainly don't use water as a coolant, as you point out. The only change I ever notice when approaching the freezing point is frost on the glass on occasion, which wouldn't be there otherwise. The humidity is often low enough here, too for the frost to not show up anyhow.
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#4634225 - 01/14/18 05:47 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
ThankYouma Offline


Registered: 12/14/17
Posts: 59
Loc: New York City
It means that there is more resistance to flow of fluids such as oil versus when it is warm or hot.. Also, that you get to know how well your heat works, if it works at all.

Your car generally doesn't care if it's in Antarctica or if it's in the tropics or hottest regions of the planet. As long as it has gas or diesel and proper fluids it should be happy. General physics apply.

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#4634226 - 01/14/18 05:51 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
BobsArmory Offline


Registered: 03/28/10
Posts: 1320
Loc: Michigan
It means that if you wash your car on the way home from work at the car wash you might not be able to open your doors in the morning.
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#4634236 - 01/14/18 06:40 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
SR5 Offline


Registered: 07/07/15
Posts: 4462
Loc: Down Under
It was +42C (108F) here yesterday, it means I can touch the steering wheel without wincing in pain, and a vinyl seat isn't going to melt flesh from my bare legs (also cold enough to wear long pants).
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#4634239 - 01/14/18 06:47 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
Warstud Offline


Registered: 09/02/05
Posts: 5395
Loc: MIchigan
I think it's used as a reference point that people can relate to.

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#4634263 - 01/14/18 07:31 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35859
Loc: Great Lakes
Originally Posted By: Shannow
But what line in the sand does 0C actually define for automobiles ?

Slippery/icy driving conditions?
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#4634289 - 01/14/18 08:07 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
KrisZ Offline


Registered: 12/23/06
Posts: 7467
Loc: Toronto, Canada
For people that live in places that the temps hardly ever get to the freezing point, it means they have to warm up their cars for 30 minutes, to get the "fluids flowing" and take extra 30 minute drive from work to burn off water and fuel dilution.

For people that live up north it means nothing, maybe keep an ice scraper in the car just in case we have freezing rain.
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#4634326 - 01/14/18 08:46 AM Re: Question - what does 0C (32F) mean to automobiles [Re: KrisZ]
Kira Offline


Registered: 08/19/10
Posts: 5238
Loc: Champlain/Hudson Valley
Any plastic or rubber part will be stiffer....to the point of "crossing a line"?....it would vary.
A useable example of a "line" could be the one presented by lubricants which stiffen and let bad U-joints, suspension bushings and sway bar links creak.
Kinda useful really.

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#4634328 - 01/14/18 08:48 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
Nothing. 0F is when cars start to moan and groan, cranking times are longer, power steering takes a moment to get going, etc.

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#4634400 - 01/14/18 09:34 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Shannow]
HoosierJeeper Offline


Registered: 11/23/16
Posts: 1276
Loc: WI
x2. 32 degrees means it's car wash weather!
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#4634407 - 01/14/18 09:43 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Ethan1]
fdcg27 Offline


Registered: 09/25/09
Posts: 15696
Loc: OH
Originally Posted By: Ethan1
Nothing. 0F is when cars start to moan and groan, cranking times are longer, power steering takes a moment to get going, etc.


Yep.
0C is fairly comfortable while 0F is starting to get really cold.
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#4634408 - 01/14/18 09:46 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Warstud]
javacontour Offline


Registered: 06/26/03
Posts: 10306
Loc: Illinois
Bingo!

It's a temperature chosen to measure attributes and behaviors of materials and systems used by the vehicle. The changes in behavior are occurring as temperatures drop (or rise).

In the case of oil, IIRC, multi viscosity oils are measured at 0c and 100c.

Originally Posted By: Warstud
I think it's used as a reference point that people can relate to.
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#4634420 - 01/14/18 10:00 AM Re: Question - what does 0C (32F) mean to automobiles [Re: Ethan1]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
It means Nothing.

10*F-15*F is when I notice changes,

cranking is a little slower, High idle stays much longer, etc.

32*F is any other day for me.
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