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Author Topic: Turning your car off when idleing Post a Reply Back to Topics
gas4meON

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Ontario

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Message Posted: Jun 9, 2011 12:05:56 PM

My colleague and i were having a discussion on this and we could not beleive that Idling your car for 60 seconds would cost as much as turning it off.

If you have any thoughts on this please let me hear them
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rumbleseat
Champion Author Winnipeg

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Message Posted: May 1, 2012 6:05:22 AM

I turn off the car when in line at the car wash, not like others I see that sit waiting with engine running, vehicle in gear, and foot on the brake. I turn off engine at railroad crossings if I can't see the last car in the line, and I have NEVER in 47 years of driving left a car idling while running into 7-Eleven, or other convenience store.
And I have only had to replace starter motors on 1 car in all those years, and that was due to a defective batch of starters back in 1994.

With modern cars, the re-start is almost instantaneous, so even shutting it off for 2 or 3 minutes saves fuel.

[Edited by: rumbleseat at 5/1/2012 9:07:39 AM EST]
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GLM4205
Champion Author Toledo

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Message Posted: Apr 29, 2012 6:53:31 PM

No
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the1roadhog
Champion Author Atlanta

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Message Posted: Apr 29, 2012 4:48:20 AM

I say turn it off.
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GLM4205
Champion Author Toledo

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Message Posted: Apr 28, 2012 7:30:19 PM

No
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Houckster
Champion Author Atlanta

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Message Posted: Apr 28, 2012 5:27:20 PM

If I'm going to be idling for more than two minutes, I'm very tempted to turn the engine off.

A number of new cars are being sold that have an engine shutdown feature. Fuel savings estimates run from 3-10%.

More cars to have automatic shutdowns
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rick_evans
Champion Author Boston

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Message Posted: Apr 28, 2012 1:30:40 PM

Your friend sell starters?
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bonbNJ
All-Star Author New Jersey

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Message Posted: Apr 27, 2012 2:03:27 AM

yes''
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dflummer
Rookie Author Illinois

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Message Posted: Apr 26, 2012 6:40:01 PM

I always turn it off when idling, not counting stop lights. Also, there is a stop light in my town where you can sit there for two minutes, so I turn it off there too.
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dontuknowOH
Champion Author Ohio

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Message Posted: Apr 26, 2012 8:05:54 AM

Years ago I ran a few tests on two carburated engine vehicles when they were fully up to summer operating temps,on a 82F degree adv. day.

One was an inline 200 cu.in. 6 cyl V/S an 289 in.V/8 both low compression with economy carbs,with measured fuel..> one gal.reg.grade, octane then was a bit higher. To make this short,the V8 consummed almost 2/3 more fuel at idle only than the six cyl.

Both were std manual shift 3 speeds,at start the entire..> carbs,fuel lines,fuelpump and fabricated one gal tank were initially empty.fuel usage was judged by actual run times(clock time). DIYing for fun.....
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PCollen
Sophomore Author Florida

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Message Posted: Apr 25, 2012 4:49:02 PM

Many German cars, starting in the early 80's, had a function built in to automatically shut off a car when stoped (at idle) and start it on again automatically when the gas pedal was depressed. In cities and densly populated areas, there were signs on poles at stop lights to "Please Turn Off Your Engine to Reduce Polution". Depending on the lenght of time at idle, it may be a 'benzine sparen' tactic, and it certainly is good in high traffic areas to reduce polution, but it's a royal PITA if you have to do it manually and continuously .
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reb01501
Sophomore Author Worcester

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Message Posted: Apr 25, 2012 8:22:53 AM

Hybrids such as my Insight automatically stop the engine while idling, except under certain conditions such as stopping on a hill. I understand more cars are going to incorporate auto-stop technology soon. I read about some Porsche models that already have it.

Yes, Car Talk has addressed this question - here is a paraphrase of their response (from memory):
It used to be true with carburated engines that starting the engine used a lot of gas so it was not worth stopping them at red lights. This is no longer true with EFI engines, and the extra wear-and-tear is minimal. The cut-off point where returns start to diminish is about 7 seconds, so idling longer than that absolutely does waste gas, unless you're driving an older car of course.
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Susieq60
All-Star Author Columbus

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Message Posted: Apr 25, 2012 7:43:24 AM

I seldom use drive through windows for that reason. I do shut engine off at drive through banking windows, waiting for trains and if I have to go through drive through fast food window and there are cars ahead
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dontuknowOH
Champion Author Ohio

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Message Posted: Apr 25, 2012 7:27:41 AM

I drive mostly 4 cyl. vehicles now,idle cost is small,also at times two V/8s are used,they use considerable more fuel at idle so I do limit them idle time. It's really about the same as watching for debris, broken glass,potholes,any objects,etc. when driving and advoiding running over these. A lot of people simply don't stay aware of these things,same as engine idle times,a friend I know never shuts off the engine after started while sitting behind the wheel.

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fondupot
Sophomore Author Illinois

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Message Posted: Apr 24, 2012 7:33:41 AM

Only if I know I am going to be idling for more than a few minutes. I hate idling. But its almost not worth it at stop lights.
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kxy4fw
Champion Author Denver

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Message Posted: Apr 24, 2012 5:49:35 AM

I always shut it off.
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forresj
Champion Author Wilmington

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Message Posted: Apr 24, 2012 5:40:28 AM

I'm guessing that you mean letting your car idle for 60 seconds is the same as starting your engine.

Yes, it's true. Some cars, I forget which model does it, will automatically shutoff the engine if it sits idle for a predetermined time.

[Edited by: forresj at 4/24/2012 8:42:36 AM EST]
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gvan
Champion Author Chicago

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Message Posted: Apr 24, 2012 5:36:28 AM

I never shut off my engine except when I'm waiting for a long train to pass through. However, one of the fuel saving devices on newer vehicles is the automatic shutdown/restart feature when you stop. If I'm to believe the automotive writers, this will be common on most vehicles in the future.
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tlhIngan_
Champion Author Calgary

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Message Posted: Apr 23, 2012 9:55:01 PM

Idling costs a little bit of gas, almost nothing compared to driving. Your RPMs are way down and the engine isn't exerting itself.
Shutting the car off at a traffic light will put extra strain on your battery, alternator, starter motor, fuel pump, oil pump and water pump when you start the car back up. These will wear out a lot sooner, and the cost of replacement is way higher than any gas you would save compared to idling.
The only time I shut the car off instead of idling is when I expect to be idling for several minutes, like waiting for the wife when I pick her up, or a freight train is crossing whatever road I'm on.

[Edited by: tlhIngan_ at 4/24/2012 12:55:35 AM EST]
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Z12
Champion Author Toledo

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Message Posted: Apr 23, 2012 5:42:31 PM

For the most part, yes
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jorobins538
Champion Author Chicago

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Message Posted: Apr 23, 2012 10:54:03 AM

depends - drives my wife crazy, so not when she's in the car.
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10261970
All-Star Author Sacramento

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Message Posted: Apr 23, 2012 10:20:39 AM

I try to turn it off when I remember too.
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kxy4fw
Champion Author Denver

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Message Posted: Apr 23, 2012 6:16:23 AM

I turn it off.
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cheap2010skate
Champion Author Tampa

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Message Posted: Apr 23, 2012 6:07:29 AM

I was at Burger King yesterday around lunchtime. A long line at the drive-through snaked through the parking lot, the cars just idling and wasting gas for a looooonnng time. I parked my car, walked in, and got my order before the folks in the drive-in lane.
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JCLNC
All-Star Author Greensboro

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Message Posted: Apr 23, 2012 1:27:23 AM

I agree. Turn your car off if you have to idle too long.
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ilu
Rookie Author Illinois

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Message Posted: Jan 6, 2012 5:54:15 PM

I agree. It only saves money if you have it idling for a significant amount of time.
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windrifter
Rookie Author KW

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Message Posted: Jan 6, 2012 5:04:59 PM

You don't have to turn off an electric or hybrid car when stopped.
It's already off and then back on as soon as you want to go :)

[Edited by: windrifter at 1/6/2012 8:06:34 PM EST]
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Sipusa
All-Star Author Sacramento

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Message Posted: Jan 6, 2012 1:44:11 PM

I usually turn the engine off when wait time is a minute or more.
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BooBooME
Veteran Author Maine

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Message Posted: Jan 6, 2012 9:53:53 AM

At one time the cut of was 5 min. when gas was $1.25 so I guess it is about a minute at these prices.
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Z12
Champion Author Toledo

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Message Posted: Jan 6, 2012 9:26:53 AM

Some of the time
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Jan 6, 2012 1:18:00 AM

ethan777oh - instead of sitting in a long line at the drive-thru park and go inside you'll save even more gas and 9 times out 10 it's faster.
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13Octane
Champion Author Tucson

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Message Posted: Jan 5, 2012 3:21:37 PM

this is a topic that never seems to go away. just do what you feel is right as there is probably no right answer.
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motehab
Sophomore Author Twin Cities

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Message Posted: Jul 5, 2011 12:12:43 PM

I agree. It only saves money if you have it idling for a significant amount of time.
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Ethan777OH
Veteran Author Ohio

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Message Posted: Jun 21, 2011 7:23:17 PM

I used to turn my car off every time I stopped somewhere or when going through a drive-thru, etc., but I found that it would just burn off more gas than when it idled. I found that putting it in park is very effective at reducing the amount of gas wasted... at least with most vehicles. My car can sit forever in park and barely burns off any gas, but driving just a few blocks around town can be ridiculous on the amount of gas consumed, especially when I have to stop for stop signs and red lights everywhere. A trick for getting around that, though, is shifting to park for red lights, especially time-consuming ones, as well as doing this when waiting at a stop sign when traffic is backed up, going through long lines at the drive thru, etc. Turning your car on and off constantly not only burns more gas than necessary, but it can also wear down parts on your car faster, costing you more in repairs and maintenance.
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stkits
Veteran Author Hamilton

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Message Posted: Jun 21, 2011 6:59:10 PM

How about shifting to neutral instead when you know you may idle for 1 minute or more. I don't think this would have any impact on the transmission over time.
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masfast1
Champion Author Fresno

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Message Posted: Jun 21, 2011 3:45:18 PM

at r/r crossings, i usually wait it out idling, lasts a couple of minutes at most.
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eye144144
Veteran Author Philadelphia

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Message Posted: Jun 17, 2011 7:31:35 AM

new buick lacrosse and ford hybrids turn off for you at a stop.
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BUSSY
Champion Author Dallas

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Message Posted: Jun 17, 2011 6:14:12 AM

The wear and tear on your starter and battery would offset any monetary savings ,if any ,you would acheive.
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pinbuster2005
Champion Author New Hampshire

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Message Posted: Jun 17, 2011 2:48:08 AM

I don't agree with turning it off at every red light. The times where idling is wasteful is when people need to let it run for 15-20 min before they go to work and when they leave work to get the interior to the temp they like. For some people that doesn't matter if it's summer or winter. They will do the same thing to either let the heater warm it up or the A/C cool it off.

Another one is when people let it idle while they are in the store getting their coffee or paper. In that couple of min the interior of the automobile isn't going to change temp that much. I've even seen people do this while they are in the store doing their weeks shopping.

Another one is people using the drive-thru at the bank or fast food place. 9 times out of 10 I can pull in right behind someone that goes to the drive thru at the bank while I park and go inside and i'm driving past them on my way out of the parking lot while they are still waiting in line at the drive thru idling away.

I can see turning your engine off at a railroad crossing when a train is going through, your stuck in construction traffic, if there was an accident and you have to wait awhile, or the things I metioned earlier. But I don't see it at every red light because most of the time they aren't long enough.
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Z12
Champion Author Toledo

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Message Posted: Jun 16, 2011 8:13:00 PM

Yes for sure
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Tiernan
Champion Author Chicago

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Message Posted: Jun 16, 2011 7:05:02 PM

Have tried to test/idle at a turn light for several days this week, but they really dont seem to be long enough (2 minutes?) to help the mileage much, and the wear and tear, nevermind the time to restart and take off when the light turns - just a little too complicated, and not helpful enough, mileage-wise.
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RiverwoodsRd
Rookie Author Washington

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Message Posted: Jun 14, 2011 8:37:59 AM

I idle most in traffic, not much I can do about that.
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WEPSMAN
Champion Author South Dakota

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Message Posted: Jun 14, 2011 6:40:24 AM

Might save sone on gas, but you are going to wear your starter faster. Replacing a starter will cost more than what you would save on gas.
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fredjara
All-Star Author California

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Message Posted: Jun 13, 2011 6:32:45 PM

I do. Went from about 17.4 MPG to 19.9. I'm doing it just because. Those posters who shared concerns about wear and tear on the starter, etc., have a valid point. Don't know if I'll continue the practice after my non scientific experiments are done.
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missbridge
Champion Author Dallas

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Message Posted: Jun 13, 2011 4:38:50 PM

Yes, Yes, Yes I love ideling at the bank, the Burger King, The Beer BArn, even the Chicas & Beer
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Bodiney
Champion Author Detroit

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Message Posted: Jun 11, 2011 6:05:54 PM

I think if your idling less than a minute, keep it running.
If you have a MPG monitor watch your mileage go down as you sit there.
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Aniche
Rookie Author Dallas

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Message Posted: Jun 11, 2011 7:55:00 AM

Yes.. this saves a lot of fuel
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missbridge
Champion Author Dallas

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Message Posted: Jun 11, 2011 7:35:29 AM


always a fun one to consider is the over reliance on drive through. Seems to have a queue of cars just idling away .
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jdragon21
All-Star Author New Jersey

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Message Posted: Jun 11, 2011 7:31:00 AM

true
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68ShelbyMan
Champion Author Houston

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Message Posted: Jun 11, 2011 6:15:06 AM

I'm thinking wear & tear of the engine/electrical components are greater than a very small amount of gas consumed.
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Dennis783
Champion Author Des Moines

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Message Posted: Jun 11, 2011 6:14:19 AM

I don't turn it off
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