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Old 12-30-2014, 12:17 PM
 
Location: Metro Washington DC
15,431 posts, read 25,811,329 times
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Cars do warm up faster when driving, even slow driving, but I still warm it up anywhere from 1-5 minutes first.
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Old 12-30-2014, 12:33 PM
 
Location: East TX
2,116 posts, read 3,049,288 times
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Can someone define "cold" for me please? When we lived in Wi the definition was different than it seems to be here in TX so I am a little confused by all this debate over idling an engine when it is "cold".
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Old 12-30-2014, 12:35 PM
 
Location: Texas
38,859 posts, read 25,535,277 times
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Default Article says idling your car before you drive is a waste of energy

I always (year 'round) let my vehicle settle down from high idle to normal idle rpm (about 15 seconds or so) after starting before I put it in gear and drive. I like to let the lubricant get distributed before putting the engine under load.

Always makes me wonder about folks who start up their car and immediately begin racing the engine.
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Old 12-30-2014, 12:43 PM
 
Location: Sector 001
15,945 posts, read 12,285,067 times
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my 2000 grand am is 15 years old with 165K miles and has been started in temperatures as low as -30F for many years... usually it has to get below -15F before I will think about warming it up much more than 60 seconds before driving off. The power steering fluid does cavitate more than a typical vehicle when it gets below about -5F but it never harms anything.

I use 0W30 Mobil 1 oil.

People who think "cold" is anything above zero, much less 15-20 degrees above zero.. now I find that funny! Let it idle for 30 seconds and drive off, unless you just want to be warm when you get in the car, then get an auto starter.
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Old 12-30-2014, 12:53 PM
 
10,926 posts, read 21,994,915 times
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Quote:
Originally Posted by Rynldsbr View Post
Can someone define "cold" for me please? When we lived in Wi the definition was different than it seems to be here in TX so I am a little confused by all this debate over idling an engine when it is "cold".
Quote:
Originally Posted by stockwiz View Post
People who think "cold" is anything above zero, much less 15-20 degrees above zero.. now I find that funny
Cold is a term relative to where you are, nothing funny about it. In Florida cold could be 50 degrees, here in NH I call cold mid 30's or below.
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Old 12-30-2014, 01:02 PM
 
24,488 posts, read 41,138,516 times
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Quote:
Originally Posted by NHDave View Post
I don't know what kind of car you drive but I've never had one that blew anything close to room temp air on a cold morning after running for only 30 seconds.
My current vehicle is an SUV with a 6.0L V8. That huge block blows room temp in 30 seconds. My previous daily driver was a sedan with a 2.5L I4 and it did the same.
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Old 12-30-2014, 01:11 PM
 
Location: Flawduh
17,184 posts, read 15,382,471 times
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Quote:
Originally Posted by NJBest View Post
My current vehicle is an SUV with a 6.0L V8. That huge block blows room temp in 30 seconds. My previous daily driver was a sedan with a 2.5L I4 and it did the same.
The big engine should take significantly longer than the small I4 to blow warm air...
30 seconds IS pretty darn fast.

You're aware that your engine coolant/antifreeze has to get hot for your vehicle to blow hot air, right? Coolant doesn't get that hot within 30 seconds... Unless you rev up the engine like crazy.
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Old 12-30-2014, 01:19 PM
 
24,488 posts, read 41,138,516 times
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Quote:
Originally Posted by Arcenal352 View Post
The big engine should take significantly longer than the small I4 to blow warm air...
30 seconds IS pretty darn fast.

You're aware that your engine coolant/antifreeze has to get hot for your vehicle to blow hot air, right? Coolant doesn't get that hot within 30 seconds... Unless you rev up the engine like crazy.
Since when is air at 20C-25C considered hot air?
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Old 12-30-2014, 01:21 PM
 
Location: Flawduh
17,184 posts, read 15,382,471 times
Reputation: 23756
Quote:
Originally Posted by NJBest View Post
Since when is air at 20C-25C considered hot air?
For your air to blow at 20C-25C in sub-zero temperatures, your antifreeze needs to be relatively hot.
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Old 12-30-2014, 01:35 PM
 
Location: Northridge/Porter Ranch, Calif.
24,511 posts, read 33,309,299 times
Reputation: 7623
Quote:
Originally Posted by NJBest View Post
Since when is air at 20C-25C considered hot air?
No, 68 degrees F to 77 degrees F (don't know why "C" is being used) is not exactly hot.
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