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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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contiki
Champion Author Ontario

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Message Posted: Oct 23, 2014 7:49:40 AM

No warm up required until cold weather is here...............
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 21, 2014 9:42:47 AM

Because I can afford a cabin heater for comfort, wondering what the others vehicles each are for. The engine, mine at least is designed to run more economically at it's thermostat high level setting. So I try to keep my go-pedal opening at a very low margin if movement is then daily required/desired/scrimping for economic levels of satisfaction(budget $$$).

It makes sense to want to save fuel, but there must be s compromise on wasting a vehicle's owned heater system plus the safety factor of driving away on any cold mornings for whatever reason. I did that on very cold nights for many years (shift exchange job)or a good two hours walk choice.

My idle costs are close to $.0166.... per minute since fuel prices have dropped, that changes with pricing/weather/engine size/vehicle driven.
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Awing1
Champion Author Ontario

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Message Posted: Oct 21, 2014 9:25:55 AM

Yes, warming up on the driveway.
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b899
Champion Author Connecticut

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Message Posted: Oct 21, 2014 8:17:32 AM

no
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contiki
Champion Author Ontario

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Message Posted: Oct 21, 2014 7:24:36 AM

We warm up our vehicles only in the winter months...........
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twt
Champion Author Virginia Beach

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Message Posted: Oct 21, 2014 5:53:13 AM

A total waste, of fuel. The engine will warm up, while you are driving.
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Mikeyy1960
Rookie Author Cape Coral

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Message Posted: Oct 20, 2014 3:57:33 PM

not needed. your burning gas for you/passengers comfort only doesn't help engine at all.
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Philo_Gray
Champion Author Twin Cities

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Message Posted: Oct 19, 2014 6:21:29 PM

IN 30 below weather, as long as it take to get some heat in the car. Long time.
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chipperd1
Veteran Author Peoria

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Message Posted: Oct 19, 2014 3:16:52 PM

About one min to get the oil flowing them I'm gone
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FrankLee1
All-Star Author Minnesota

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Message Posted: Oct 18, 2014 10:24:36 PM

contiki, where are you? We don't know what your opinion is TODAY.
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 18, 2014 8:03:38 AM

There may be a few days this Winter that I may need to warm-up a vehicle a very few times. The tractor being diesel usually yes, (snow plowing) but the others, depends on safety for Winter conditions, We stay home on adverse days often.
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twt
Champion Author Virginia Beach

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Message Posted: Oct 18, 2014 5:45:58 AM

A waste of fuel.
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dchawk81
Sophomore Author Pennsylvania

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Message Posted: Oct 18, 2014 4:23:17 AM

I've never done the math on it, but unless it's freezing cold outside and I need to brush ice/snow off anyway, I don't bother letting it warm up first. It's usually up to temp in a few minutes under normal conditions and I can be well on my way to wherever by then.

And the only reason I'll prewarm it while I'm scraping ice is to make it toasty warm when I get in.

[Edited by: dchawk81 at 10/18/2014 4:23:59 AM EST]
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Awing1
Champion Author Ontario

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Message Posted: Oct 17, 2014 11:02:18 AM

yes, warming up
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 17, 2014 10:34:57 AM

Maybe mid Winter if I install remote start, old bones get older Right! I paid for a comfort heater system. Still in each vehicle, Glove box, no gloves, no junk, but misc.

A paper towel dispenser, traffic congestion dispenser, and a built in electric chassis jack, all handy even for a non warm-up vehicle. Gee I may need to refigure my idle cost since prices are falling!
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contiki
Champion Author Ontario

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Message Posted: Oct 17, 2014 7:06:41 AM

No warming up the vehicles until the winter months are here...........
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rpainter76
Rookie Author St. Louis

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Message Posted: Oct 15, 2014 5:48:06 PM

No
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cwwilliams1978
Rookie Author Austin

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Message Posted: Oct 14, 2014 8:40:32 AM

NO
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b899
Champion Author Connecticut

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Message Posted: Oct 14, 2014 8:36:01 AM

no
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hoopitup2000
Champion Author Virginia

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Message Posted: Oct 14, 2014 7:00:38 AM

Not happening here
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twt
Champion Author Virginia Beach

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Message Posted: Oct 14, 2014 5:49:35 AM

Warming up the car, is a waste of fuel.
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badbobKY
All-Star Author Lexington

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Message Posted: Oct 14, 2014 4:37:03 AM

yes
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 14, 2014 2:52:03 AM

Back in the days of carburetors, the early Buick V/8 engines always had a somewhat rougher Camshaft sound during warm-up, then at slow idle even. I always thought those "Nail head engines" did have a hotter grind but never checked it out.

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Tucsonhomes
All-Star Author Tucson

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Message Posted: Oct 13, 2014 2:25:32 PM

Cold winter months?
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stoihor
Champion Author San Bernardino

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Message Posted: Oct 12, 2014 7:04:05 PM

No reason with the new cars.
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 12, 2014 12:42:13 PM

During any cold weather, driving away produces very cold blasts entering the under-hood areas of vehicles while the engine is, components are trying to reach normal operation temps, the most(economical temps).

I see that as a problem, motion build-up wind-chill event. Think what it would be like to not have a windshield on any cool morning driving away also with the side windows down. Under-hood stuff relates to the same conditions only by economics, "Engines" know about "Block heaters"?....
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PaylessKY
Champion Author Kentucky

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Message Posted: Oct 11, 2014 12:04:20 PM

Only when needing to clear the windows.
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saint2011
Rookie Author New York

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Message Posted: Oct 10, 2014 1:52:45 PM

Old cars yes But now with todays cars I just drive easy until it warms up
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hoopitup2000
Champion Author Virginia

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Message Posted: Oct 10, 2014 6:41:00 AM

There is no mechanical reason to warm up modern automobiles.
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Awing1
Champion Author Ontario

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Message Posted: Oct 10, 2014 5:16:52 AM

yes
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Jetta_Pilot
Champion Author Toronto

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Message Posted: Oct 9, 2014 5:54:37 PM

Its a fact that you should start the car, let it idle for maybe one minute and then move off at no more than city speeds until the engine warms up.

Letting it sit and idle is a waste of fuel!!!!
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drgeeforce
Sophomore Author Los Angeles

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Message Posted: Oct 9, 2014 3:34:54 PM

Letting the car warm up as you drive would be more economical since you are getting miles as you are moving. Letting the car warm in the driveway gets you zero miles. Nada, zip, zilch. The old method of warming up harkens back to the carbureted engine days where a cold engine ran rich in fuel mixture to a point of flooding, then stalling, causing the driver to lose power in the brakes and steering, reducing the safety of everyone around. Computer controlled fuel injection accounts for all that, now the driver only needs to keep the RPMs low until the engine warms.
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b899
Champion Author Connecticut

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Message Posted: Oct 9, 2014 8:58:25 AM

no
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hoopitup2000
Champion Author Virginia

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Message Posted: Oct 9, 2014 6:32:08 AM

Not . . . .
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luvmyburgi
Champion Author Ohio

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Message Posted: Oct 8, 2014 9:23:37 PM

Waste of fuel
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46chief
Champion Author Indiana

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Message Posted: Oct 8, 2014 3:24:37 PM

winter only.
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contiki
Champion Author Ontario

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Message Posted: Oct 7, 2014 7:44:21 AM

Not required until the winter months are here..............
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 6, 2014 1:53:29 PM

I would think any vehicle would use more fuel as to drive away because that vehicle is in enrichment mod for several minutes and also at higher Engine RPMs under more load than at idle.

Then two lighting may be on along with other accessories which pulls an additional engine alternator load, requiring more HP. energy while in ECM/EFI enrichment, cold weather components stiffness in effect, rolling stiffness of the tires, all during the richer mod in effect.

Mileage is a different cost and is effected by what other conditions exist point A...point B... along with how you apply the pedals....both pedals. As I see it one could keep track of engine run time against refuel cost, trying both habits for over a period of time(reaching refueling)maybe the answer would enlighten your concern. Price changes will always throw it off anyway!
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b899
Champion Author Connecticut

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Message Posted: Oct 5, 2014 8:32:17 AM

no
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Awing1
Champion Author Ontario

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Message Posted: Oct 4, 2014 3:22:51 PM

yes
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b899
Champion Author Connecticut

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Message Posted: Oct 4, 2014 9:08:45 AM

no
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contiki
Champion Author Ontario

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Message Posted: Oct 3, 2014 7:21:09 AM

At this time of years, warming up the vehicles is not required..........
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weddy11
Champion Author Phoenix

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Message Posted: Oct 1, 2014 9:37:12 AM

No
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Awing1
Champion Author Ontario

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Message Posted: Oct 1, 2014 8:49:50 AM

I've never tested whether it is more economical.
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dontuknowOH
Champion Author Ohio

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Message Posted: Oct 1, 2014 8:45:33 AM

Engine run time is always a fuel user, depends on how long. Mileage is a choice V/S habits/conditions/vehicle weight/size/wind direction, more..... gas prices. G-Luck on improvements!
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LarryMarg
Champion Author New York

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Message Posted: Sep 30, 2014 9:31:18 AM

From Fuel, tires, brakes, oil: Four car myths debunked:

Your engine doesn't need to warm up anymore

When the mercury falls, motorists are conditioned to allow their vehicles’ engines to run for a few minutes before setting out on the road. But unless you're just trying to heat the cabin, modern engines are typically ready to go once awakened.

"In older cars, carburetted engines absolutely need a warm-up because they are designed with a constant air-fuel ratio,” Quora user Garrick Saito, wrote. “If the engine was not warm enough, older engines would tend to stall." But fuel injectors and the engine control unit (ECU) have made things much simpler for drivers.

In the 1980s, car manufacturers moved away from carburettors to fuel-injection systems, and more recently have adopted direct-injection solutions that spray gasoline precisely into cylinders, right where it is needed. When paired with the ECU, most engines so equipped run fine straight away, no warming required. Saito added that with their sophisticated ECUs, newer cars "are able to change the settings to the required ratio, based on ambient air temperature."

And don't fuss over warming up the oil, either. Though oil flows better when warmed, it reaches optimum temperature sooner when the car is in motion – just don't drag race right out of the gates.
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dontuknowOH
Champion Author Ohio

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Message Posted: Sep 30, 2014 6:40:13 AM

My econos: Usually 10 seconds on a fresh start-up, then drive away moderate at temps of 50+ F degrees an above.

About 30 sec. is average, when Winter is the norm and if temps are below 20 F, I allow the engine to warm a one minute minimum up to three minutes, before moving away. That's close to 150* engine coolant that's still building on up to normal operation(thermostat settings).

If safety, wear/tear is the true concern even the amount fuel use, this WFM. The garage adds a benefit, block heaters, patio/car-port, semi-heated garage, a ducted home heat supply line insulated pipe to ones outside cowl vent to the cabin area can be DIY'ed if a (forced air type home furnace).

Similar to some crawl spaces being partial heated by an extra smaller forced air furnace duct outlet applications only used during colder Winters.
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hoopitup2000
Champion Author Virginia

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Message Posted: Sep 30, 2014 6:28:25 AM

Warm up time is usually 5-10 seconds
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rcsteve23
Champion Author Ohio

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Message Posted: Sep 29, 2014 3:43:58 PM

no
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redfish67
Champion Author Dallas

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Message Posted: Sep 28, 2014 11:06:28 AM

no
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