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Author Topic: Warming up the car Back to Topics
JamCoope

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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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dontuknowOH
Champion Author Ohio

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Message Posted: Apr 19, 2015 9:51:33 AM

30 seconds, then I drive away, most of the time, a bit longer for Winter conditions. Summer about 10 seconds and gone.
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JohnCur
All-Star Author New Jersey

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Message Posted: Apr 19, 2015 9:15:56 AM

no
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b899
Champion Author Connecticut

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Message Posted: Apr 19, 2015 7:29:03 AM

no
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rich7177
Rookie Author Chicago

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Message Posted: Apr 19, 2015 1:33:33 AM

It better to drive the car than leave it idle.You waste gas when you not moving.
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cousin1131
Rookie Author Indiana

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Message Posted: Apr 18, 2015 4:06:28 AM

who cares
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cousin1131
Rookie Author Indiana

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Message Posted: Apr 18, 2015 4:05:23 AM

doesn't matter
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cousin1131
Rookie Author Indiana

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Message Posted: Apr 18, 2015 4:04:55 AM

drive till it is warm my friend
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cousin1131
Rookie Author Indiana

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Message Posted: Apr 18, 2015 4:04:14 AM

75 degree weather
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cousin1131
Rookie Author Indiana

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Message Posted: Apr 18, 2015 4:03:38 AM

ok
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cousin1131
Rookie Author Indiana

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Message Posted: Apr 18, 2015 4:03:11 AM

no need now
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jonjax14
Champion Author Jacksonville

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Message Posted: Apr 18, 2015 12:19:55 AM

ok
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dontuknowOH
Champion Author Ohio

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Message Posted: Apr 17, 2015 8:52:02 AM

I just believe that anytime after a cold morning engine start-up, when the engine has been at rest overnight, 10 or thirty seconds is too short of a time, to move out with motion.

Not that any harm to the engine or drivetrain would develop, but more throttle energy is needed above the idle amount to propel that vehicle. There stand to reason that the enrichment mode is activated at that time of engine trying to warm to normal.

The thought of 3 times more, plus or minus that amount of fuel use varies in extra fuel at that interval(first 4-5 minutes) of engine run time precluding a cold engine temp. start.

Saying 1/8, 1/4, 1/3 throttle opened up then near, ETC. nearly X 3 is as much enrichment amounts seems likely for the first few minutes of use while moving away in motion. That travel even varies with routes/drivers in traffic during engine warming. During idle the engine warming isn't under any engine load, well any loads nearly as much as moving that vehicle. Same for the fuel consumption, idle is way less than the mentioned larger go pedal positions for motion.

My Thoughts only....... AIsi...... Tail-pipe Fumes...... More/less!
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hyeglenn
Champion Author Fresno

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Message Posted: Apr 17, 2015 7:32:49 AM

NO.
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b899
Champion Author Connecticut

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Message Posted: Apr 17, 2015 6:50:54 AM

no
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MikeCapeCoral
Champion Author Cape Coral

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Message Posted: Apr 16, 2015 12:06:38 AM

In Florida?
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b899
Champion Author Connecticut

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Message Posted: Apr 15, 2015 7:01:20 AM

no
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moxxor54
Veteran Author Missouri

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Message Posted: Apr 12, 2015 6:04:56 PM

Not too long
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StArrow68
Champion Author Oakland

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Message Posted: Apr 12, 2015 3:14:56 PM

Ah, the advantage of having the low temp at night around the mid 40's, no warm up required.
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juniperus98
Sophomore Author Alberta

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Message Posted: Apr 12, 2015 1:41:54 PM

No
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b899
Champion Author Connecticut

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Message Posted: Apr 11, 2015 8:31:13 AM

no
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 8, 2015 11:42:21 PM

"Agree. Performance street driving uses far more gas than 5 minutes of idling."

You're right of course, but I wasn't even talking about aggressive driving. I was pointing out that even driving 70mph instead of 60mph also "wastes" gas, as surely as idling does. Someone who criticizes idling as wasteful and polluting, while he admittedly drives above the optimum-mileage speed for his car, is a hypocrite.
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hyeglenn
Champion Author Fresno

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Message Posted: Apr 8, 2015 9:12:03 PM

Only in the winter.
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cwje
Rookie Author Springfield

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Message Posted: Apr 8, 2015 5:55:29 PM

when below zero (F), I warm the car for up to 15 seconds before slowly heading out the driveway
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Hemond
Champion Author Providence

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Message Posted: Apr 8, 2015 11:35:39 AM

:::::: since I have seen your other posts bragging about how fast you drive and how it's not worth the extra time to drive slower to save gas.::::


Agree. Performance street driving uses far more gas than 5 minutes of idling. If one is going to 'throw bricks' at other posters for wasting gas while idling, he should move out of his glass house.

Street racing, boy-racer style driving, cornering on 2 wheels, stop light racing, etc are all huge gas sucking pits of fuel waste. Not to mention knocking the tar out of a car. "Fast and Furious" is fantasy driving for the movie screen. Not for driving around town. Oh yeah,speaking of F&F, the same fate that befell Paul Walker is likely to happen to you boy racers.
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jay93LA
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Message Posted: Apr 8, 2015 8:30:46 AM

no
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b899
Champion Author Connecticut

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Message Posted: Apr 8, 2015 8:08:19 AM

no
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hoopitup2000
Champion Author Virginia

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Message Posted: Apr 8, 2015 6:48:36 AM

99% of the time, I start & go.
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GLM4205
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Message Posted: Apr 8, 2015 6:09:10 AM

No
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redfish67
Champion Author Dallas

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Message Posted: Apr 7, 2015 1:25:13 PM

waste of money
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 7, 2015 9:47:56 AM

"idling for even a few minutes is execeptionally polluting of the air we ALL breathe and contributing to global warming and the changing climate"

Driving faster than the speed where you get the optimum mileage (between 80 and 100 kph for most vehicles) also pollutes the air. gouged, you have no credibility on the issue of waste and pollution, since I have seen your other posts bragging about how fast you drive and how it's not worth the extra time to drive slower to save gas. Where is all this concern about polluting the air while you're flying down the freeway at 120 kph?
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twt
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Message Posted: Apr 7, 2015 7:06:52 AM

it's a waste of time and fuel.
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Hemond
Champion Author Providence

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Message Posted: Apr 7, 2015 12:05:45 AM

::::HOwever, idling for even a few minutes is execeptionally polluting of the air we ALL breathe and contributing to global warming and the changing climate
:::


THere is no such thing as AGW global warming. There is no proof that mankind, or CO2 , or burning fossil fuels has any correlation to climate. Indeed there is no evidence of climate changing. If anything, its getting colder. I still have snow in my yard. March both came in and went out like a lion. April also came in like a lion. I expect to go skiing on tax day April 15th.

As for idling, that uses a miniscule amount of fuel. a few teaspoonfuls. One good jack rabbit traffic light start uses far more fuel than 5 minutes idling.
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Nar25
Rookie Author Toronto

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Message Posted: Apr 6, 2015 6:59:11 PM

o.k
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gougedQC
Champion Author Montreal

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Message Posted: Apr 6, 2015 6:56:23 PM

well, seems a lot of people still dont get that mechanically there is no reason whatsoever to "warm" the engine of modern vehicles...ie pretty much anything from the year 2000 on.

seems like spending a little money burning gas to warm up the interior doesnt worry them.. doesn't particularly bother me either..your money not mine.

HOwever, idling for even a few minutes is execeptionally polluting of the air we ALL breathe and contributing to global warming and the changing climate

[Edited by: gougedQC at 4/6/2015 6:56:51 PM EST]
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gator2002
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Message Posted: Apr 6, 2015 10:43:19 AM

I do in the winter months.
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 6, 2015 9:22:52 AM

Very convincing argument, b899. You really earn that 20 points. Thanks for adding so much to the discussion!
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b899
Champion Author Connecticut

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Message Posted: Apr 6, 2015 8:30:01 AM

no
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b899
Champion Author Connecticut

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Message Posted: Apr 5, 2015 7:41:31 AM

no
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 4, 2015 11:17:02 PM

"A waste of time..."

20 seconds to walk out to the car, start it, and walk back to my nice warm house to have breakfast and finish getting ready for work. Less time than it would take to scrape ice off the windows.

"A waste of...fuel."

A very minor expense that makes my morning commute far more comfortable and considerably safer. Far cheaper than many other comforts we all would never give dream of sacrificing. Adjusting the thermostat in your home by a couple degrees would save far more (especially the A/C in the summer), as would turning off your TV and reading a book. Accelerating slower and driving slower would also have a far greater effect on your fuel usage than not warming up your car.
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twt
Champion Author Virginia Beach

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Message Posted: Apr 4, 2015 4:36:59 AM

A waste of time and fuel.
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 3, 2015 10:28:27 PM

"Yes you can but it doesn't come out anything like the coffee shop coffee."

I didn't know that, but then I don't drink coffee, so I know very little when it comes to coffee.

"I can get into traffic at a stop light and not have to zoom up to speed as at my street."

Whatever works for you; if it wasn't so much longer for me, I'd probably avoid merging onto I80. As it is, I make sure I'm ready and so is my car, and if I ruin the engine running it too hard, I've got a spare almost ready in the garage. I also found an almost identical car in a local junkyard last week. Sweet!
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Hemond
Champion Author Providence

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Message Posted: Apr 3, 2015 5:38:05 PM

::::(you can even buy Dunkin Donuts coffee at the grocery store now). You'd save more in coffee than you spend for gas.::::


Yes you can but it doesn't come out anything like the coffee shop coffee. ANyways, I like stopping at the shop. Also the DD app is full of coffee discounts. Typically 1/2 priced coffee. This month its 99cents a cup with the app.

But cost is not a concern to me, I go the back way so as not to have to merge into high speed traffic with a cold engine. Going the extra couple of blocks out of my way gives an extra minute or so to warm the engine. Also, I can get into traffic at a stop light and not have to zoom up to speed as at my street.
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 3, 2015 4:24:30 PM

"I do this all the time if I haven't warmed up my car ahead of time."

I'm sure you're one of the few who actually thinks about it.

You have a reason to go out of your way, i.e. stopping for coffee. Unlike some people, I would not berate anyone for their choices in these matters. Although, another option would be to make coffee while the car is warming up (you can even buy Dunkin Donuts coffee at the grocery store now). You'd save more in coffee than you spend for gas.

I don't have any alternate routes that wouldn't take me twice as long to get to work, nor any reason to go out of my way. I would just be driving around for no reason other than to warm the engine, which would be at least as bad as idling in the driveway.
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Hemond
Champion Author Providence

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Message Posted: Apr 3, 2015 3:05:47 PM

::::"...drive conservatively until the car warms up."

A nice thought, but who does that? :::::



I do this all the time if I haven't warmed up my car ahead of time. I take the back route when leaving my house. This requires me to go a couple of blocks out of my way. But it avoids having to merge into high speed traffic with a cold engine too. It also lets me stop at the Dunkin Donuts and idle a few minutes at the drive in window. Kills 2 birds - getting a coffee and warming my engine a couple minutes.

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lyons_coop
All-Star Author Kansas

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Message Posted: Apr 3, 2015 1:46:26 PM

No I haven't. In the winter months I just let it warm up for about 10 minutes... which also gives the seat and the steering wheel time to warm up.
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HotRod10
Champion Author Wyoming

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Message Posted: Apr 3, 2015 11:54:21 AM

"...drive conservatively until the car warms up."

A nice thought, but who does that? Most people don't pay any attention to how hard they're running their cold engine, or couldn't safely putter along until the engine gets warm

I'm one of those who doesn't have the luxury to be conservative on my commute. I'm going up an on-ramp to I80 and merging in with big rigs going 75 mph before I'm even a quarter of a mile from home. The only way to do that safely is to run my little Metro and it's 1 liter engine hard. I floor it and push it to about 5000 rpm before shifting to reach a safe merging speed.

That's why I warm it up before I leave the driveway. It's better for the engine and my windows don't fog up while I'm trying to squeeze between trucks at 75mph.
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hoopitup2000
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Message Posted: Apr 3, 2015 6:25:44 AM

Only when the defroster is a must. Otherwise start & go.
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waynester1955
All-Star Author Ontario

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Message Posted: Apr 3, 2015 3:13:49 AM

Barely and then drive conservatively until the car warms up.
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SAButton
All-Star Author Atlanta

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Message Posted: Apr 2, 2015 11:33:44 AM

No
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b899
Champion Author Connecticut

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Message Posted: Apr 2, 2015 8:08:40 AM

no
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Raider44
Champion Author Allentown

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Message Posted: Apr 1, 2015 6:49:05 AM

I warm up only when the defroster is a necessity.
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