What wastes more gas? Idling or Turning your car off and then right back on (5min)

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Old 10-26-2005, 01:26 PM
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What wastes more gas? Idling or Turning your car off and then right back on (5min)

Ive always wondered...Heres the scenario: Lets say you are waiting in a parking lot for someone to get off work, your tank is almost "E" and you dont have the time to go to the gas station and come back. They were supposed to get off work @ 7 sharp but ended up coming out around 7:05.


Would you have:

1. Turned off your car knowing they were going to be 5 min late?
2. Keep the car running because you arent sure if it will turn on again?

When I turned my car back on, the needle was significantly below the Empty line. Before I had turned the car off it was right on the line.

I know in many states it is illegal to idle your car, the carbon monoxide is that bad. Just the other day on the news some family had a pick up truck with an exhaust leak. Well they had one of those crew cabs and 2 children back there. The children died within minutes because of cm poisoning.
Old 10-26-2005, 01:29 PM
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I think it's better to turn your car off...?

And oh, :ibtmovetocartalk:...!
Old 10-26-2005, 01:32 PM
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Turn car off.

Will use less gas but I would assume starting and stopping your car all the time would be a little tougher on all the parts vs letting it idle
Old 10-26-2005, 01:34 PM
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For 5 min. I would turn the engine off.
Old 10-26-2005, 01:35 PM
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You'd waste more gas idling. I've read if you are going to idle for more than 30 seconds you will save gas by turning the car off instead of idling.
Old 10-26-2005, 01:38 PM
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Originally Posted by 65 Fury Convert
You'd waste more gas idling. I've read if you are going to idle for more than 30 seconds you will save gas by turning the car off instead of idling.
Thats what I've heard also
Old 10-26-2005, 01:42 PM
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There are times I actually turn off motor IN TRAFFIC when I am stuck there and I figure it is going to take more than a few minutes.
Old 10-26-2005, 01:49 PM
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Originally Posted by magnifico
There are times I actually turn off motor IN TRAFFIC when I am stuck there and I figure it is going to take more than a few minutes.
donkey!


Anyway, 95gt has it right
Old 10-26-2005, 02:16 PM
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you burn more gas idling for 5 min, but its rougher on the engine to start/stop it.
Old 10-26-2005, 02:42 PM
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if your going to be turning the car onand off its alot easier on the car to leave it runing. If its justa 1 time thing shut it off.

my Tl idles all day long since its alot easier on it to idle than to turn on and off.
Old 10-26-2005, 03:05 PM
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another question along the same lines...why is it that big rigs idle...all the time, if it's so wasteful???
Old 10-26-2005, 03:07 PM
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All the new gas/electric hybrids turn the gas engine off when stopped.
That should give you a hint.
Old 10-26-2005, 03:11 PM
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Originally Posted by jz-97-c7
another question along the same lines...why is it that big rigs idle...all the time, if it's so wasteful???
Lazy truckers
Old 10-26-2005, 03:33 PM
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Originally Posted by jz-97-c7
another question along the same lines...why is it that big rigs idle...all the time, if it's so wasteful???
Diesel Engines work differently
Old 10-26-2005, 05:36 PM
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Look at it this way. When you arrived and didn't see the person waiting for you or coming out to the parking lot, you really don't know how long you would have been there. It might have been 20 minutes instead of 5. So, yes, turn your engine off and wait for your passenger.
Old 10-27-2005, 01:08 AM
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Originally Posted by jz-97-c7
another question along the same lines...why is it that big rigs idle...all the time, if it's so wasteful???
i think it has something to do with the diesel motor and keeping the motor consitantly warm...
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