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Author Topic: Warming up the car Back to Topics
JamCoope

Rookie Author
Maryland

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Message Posted: Jan 26, 2011 10:21:52 AM

Most people agree that cars run more economically once they're warmed up... especially in the cold winter months.

Here's a question: has anyone tested whether it is more economical to let your car warm up by idling in the driveway, or by just letting warm up as you drive?
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Shockjock1961
Champion Author Illinois

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Message Posted: Nov 21, 2014 9:17:20 AM

"There is no repeat no technological reason to let your engine idle uselessly"

Possibly, but there are safety an legal reasons to allow your car to warm up...
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badbobKY
All-Star Author Lexington

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Message Posted: Nov 21, 2014 6:35:13 AM

yes
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gougedQC
Champion Author Montreal

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Message Posted: Nov 21, 2014 6:21:04 AM

There is no repeat no technological reason to let your engine idle uselessly. You get in and go. if it's below freezing, even well below the fact holds true.
The purpose of warming the engine was due to technology prior to about 1980, and was to prevent the possibility of stalling in traffic due to things like frozen carbs.
With computer control and injection, and modern oils..there is ZERO need to warm up.
for comfort? do you not dress properly to go to the car? Arguments about window fogging easily dealt with be leaving a window cracked open.

Since the snow hit, i have seen cars idling for as much as an hour...waste of gas? hey your money, not mine... but ridiculous amount of air pollution and we're already warming the planet towards some real problems.
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twt
Champion Author Virginia Beach

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Message Posted: Nov 21, 2014 3:30:16 AM

The engine will warm up, as you drive. It should start warming up, within a couple of miles. If not, check your thermostat.
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StArrow68
Champion Author Oakland

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Message Posted: Nov 20, 2014 10:30:51 AM

Ah, the advantage of a garage and no snow, with the temps usually never below the 40's. Start and drive off slowly, the engine warms quicker under light load than at idle and the rest of the fluids that don't warm at idle are getting a chance to warm up as the same time.
Saw a car in upstate NY with almost 4 ft of snow on the roof going down the road, can't be doing much for mpg.
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CHEAPERBETTER
Veteran Author Lansing

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Message Posted: Nov 20, 2014 10:27:58 AM

I doubt it makes enough difference to measure one way or the other.
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b899
Champion Author Connecticut

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Message Posted: Nov 20, 2014 8:51:49 AM

no
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dontuknowOH
Champion Author Ohio

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Message Posted: Nov 19, 2014 9:41:03 AM

It will happen for comfort/safety during Winter. When necessary, 30 seconds...... about three minutes max, for Summer,10 seconds and gone, Windows down..... then on comes the A/C as needed GREAT!..... habit!
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retiredssgt
Veteran Author North Carolina

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Message Posted: Nov 19, 2014 8:32:48 AM

In Jacksonville, NC, it was twenty degrees on November 19 so I let my vehicle warm up for eight minutes and then I turned on the defrost.
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contiki
Champion Author Ontario

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Message Posted: Nov 19, 2014 7:42:08 AM

The cold weather is here in Ontario......

We now warm up our vehicles each morning.......
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Madridjoe
Veteran Author Lancaster

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Message Posted: Nov 19, 2014 7:09:23 AM

just a minute or so to give oil a chance to get where it needs to be
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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 19, 2014 6:33:57 AM

16° this morning & warmed up the car for about 5-10 seconds. Much faster warm up if the car is moving.
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ggg452
Champion Author Manitoba

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Message Posted: Nov 19, 2014 6:25:23 AM

Only if it is really cold....-25....things are too stiff.
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RalphHightower
Champion Author South Carolina

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Message Posted: Nov 19, 2014 6:21:42 AM

I'll warm up the car this morning. It's 19°F today.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Nov 19, 2014 3:46:05 AM

If it's real cold I still scrape my windows and then start and go. I'll go thru town and get on the 55 mph road at the other end of town instead of right by my house to get the engine and transmission warmed up before going 55 mph. I have plenty of heat before I'm even half way across town and I'm 5 mins into my drive instead of letting it sit there for 20 mins to do the same thing. I also dress for the weather.
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Jay4Runner
Champion Author Oakland

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Message Posted: Nov 18, 2014 10:30:09 PM

Pretty much warm up in neutral as I coast down the hill in the morning.
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dontuknowOH
Champion Author Ohio

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Message Posted: Nov 18, 2014 9:47:43 AM

Ah yes those heater/defroster gadgets at a touch of the buttons, but my older vehicle has set and forget controls of the "mid 80's" for cabin comfort.

Now we have heated seats, mirrors, steering wheels, coffee/beverage warmers, rear defrosters, washer deicers, elec. defoggers, heatlamps?

Engine block heaters, heated scrapers, battery warmers, engine blankets, oil pan/dip stick heaters, more.... all for Winter economy? Really!
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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 18, 2014 6:31:11 AM

Only in the most extreme conditions. Usually less than 5 second warm-up.
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GLM4205
Champion Author Toledo

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Message Posted: Nov 17, 2014 5:30:14 AM

Only if the windows need to be cleared.
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JohnCur
Sophomore Author New Jersey

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Message Posted: Nov 17, 2014 5:20:02 AM

Only warmup in driveway when below 25F
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twt
Champion Author Virginia Beach

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Message Posted: Nov 17, 2014 2:38:01 AM

Another waste, of gas.
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RealtorJeff
All-Star Author San Diego

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Message Posted: Nov 16, 2014 8:29:53 PM

I don't think so. Warm up in San Diego is not common?
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Floridaman2013
Champion Author Florida

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Message Posted: Nov 16, 2014 1:52:59 PM

In Florida, as soon as the engine idles down I'm gone.
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ChiefNolarama
Sophomore Author Nebraska

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Message Posted: Nov 16, 2014 12:27:12 PM

No need to warm up a car for better mileage. Comfort and safety are about the only reasons to consider these days.
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PaylessKY
Champion Author Kentucky

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Message Posted: Nov 16, 2014 9:17:12 AM

If the windows need to be cleared.
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Gearwrench
Champion Author Grand Rapids

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Message Posted: Nov 16, 2014 8:49:04 AM

just to clear ice off windows
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 16, 2014 8:10:45 AM

In the winter, I just want the windows frost free and inside a little warm. I will start the car before I get into it.
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carinthuist
Champion Author San Francisco

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Message Posted: Nov 13, 2014 10:15:01 AM

no
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redfish67
Champion Author Dallas

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Message Posted: Nov 13, 2014 9:53:02 AM

no warmup, it's not necessary
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LibertyGuardian
Veteran Author Arizona

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Message Posted: Nov 13, 2014 8:30:52 AM

Being retired after 40 plus years of hard work we enjoy the rewards of comfort we worked for and one of those little luxuries is getting into a comfortable car without having to put up with the cabin being freezing cold or blazing hot.
What little additional fuel may or may not be used in either warming it up or cooling it down depending on the season is of no concern to us whatsoever.
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ggg452
Champion Author Manitoba

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Message Posted: Nov 13, 2014 6:11:37 AM

With fuel injection, most warm ups are unnecessary....now when the temp goes to -40....warm up is entirely a good idea....
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twt
Champion Author Virginia Beach

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Message Posted: Nov 13, 2014 5:27:22 AM

I just drive. It warms up, in about two minutes.
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FrankLee1
All-Star Author Minnesota

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Message Posted: Nov 12, 2014 11:56:36 AM

Good info drydem
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drydem
Veteran Author Maryland

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Message Posted: Nov 11, 2014 7:03:24 PM

The Prius is more fuel efficent if it is warmed up by an electrical 400w engine block heater (EBH) - but the EBH needs about 30 to 60 minutes (200w to 400w) to make a difference in below freezing conditions. If you don't have an EBH, it is more fuel efficient just to drive the Prius immediately after starting it. To optimize fuel efficiency during the warm up cycle of a Prius -- during the first five minutes keep the Prius speed under 25 mph.
And for speeds under 50 mph and temperaturs under 50 F degrees - block the front grill air intake vents. If there is frost-ice on the windows scrape most of it off before starting your car so the defroster won't have to work as hard to keep the windshield clear.



[Edited by: drydem at 11/11/2014 7:05:38 PM EST]
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b899
Champion Author Connecticut

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Message Posted: Nov 11, 2014 8:45:51 AM

no
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PaylessKY
Champion Author Kentucky

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Message Posted: Nov 9, 2014 8:33:22 AM

Only if the windows need to be cleared.
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contiki
Champion Author Ontario

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Message Posted: Nov 9, 2014 8:24:20 AM

We always warm up our vehicles in the cooler months..............
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contiki
Champion Author Ontario

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Message Posted: Nov 6, 2014 6:54:46 AM

When the cold weather is here in Ontario warming up the vehicles in the morning is needed......

People clearing their frosted up windows and warming up vehicles are the normal in our area each cold morning.......

That is what happens in Ontario and in our area on most cold mornings by many people.......
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selvan777
Rookie Author Sacramento

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Message Posted: Nov 5, 2014 5:36:46 PM

I usually select a path that will allow for low speed as I roll to handle warming. That is to say I hardly ever sit idling in park to do so.
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b899
Champion Author Connecticut

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Message Posted: Nov 5, 2014 8:54:50 AM

no
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Hemond
Champion Author Providence

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Message Posted: Nov 5, 2014 8:05:19 AM

QuOTE :::::Over 3,600 posts and still STILL people dont get it. There is NO mechanical need to warm up the engine.:::::


Looks like you haven't read a single one of those 3600 posts.


People are warming for biological reasons - a warm cabin is comfortable, and safety reasons - to see out. Not mechanical. Furthermore, idling for 5 minutes uses an insignificant amount of fuel.


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hoopitup2000
Champion Author Virginia

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Message Posted: Nov 5, 2014 6:34:25 AM

Nope . . . .
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Nov 5, 2014 1:18:45 AM

frost getting on the windows now but I still won't warm up the automobile. That's what they make scrapers for. I'd rather scrape my windows for 5 mins than warm my automobile for 20 to do the same thing.
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GasMiser718
Champion Author Detroit

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Message Posted: Nov 4, 2014 11:28:49 AM

I also warm the car to get the frost off the windows. Seems like a safety thing to me!!!
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contiki
Champion Author Ontario

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Message Posted: Nov 1, 2014 9:01:27 AM

The weather in our area is getting colder in the mornings now, frost is all over the windows.......it is time for morning warm ups to begin.......
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dontuknowOH
Champion Author Ohio

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Message Posted: Nov 1, 2014 2:21:44 AM

Just for 20 points, I always want to be sure my heater system is always working, a remote start would let me know by just looking out my kitchen window at the vehicle windows defrosted, now that is convenience!

Winter brings my idle cost up to nearly $.028..... $.033 per minute warming, before fuel prices dropped when then at $3.60 average a gal.

The garage is cheaper for overnight shelter/warm-up on BRrrrrr mornings. I detect heat at the vents, 1.5 minutes, love those DIY refinements,. The OEMs ought to work out a quicker cabin heater system, I don't understand that lack, with all the wasted engine discharged heat presently lost away.............Misc.
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contiki
Champion Author Ontario

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Message Posted: Oct 31, 2014 7:23:13 AM

The weather is getting colder in the mornings now, frost is on the windows.......time for morning warm ups to begin...............
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badbobKY
All-Star Author Lexington

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Message Posted: Oct 30, 2014 9:25:31 AM

winter time
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b899
Champion Author Connecticut

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Message Posted: Oct 30, 2014 8:13:46 AM

no
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b899
Champion Author Connecticut

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Message Posted: Oct 27, 2014 8:02:29 AM

no
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