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  Automobiles: Does Shifting into neutral really fuel economy?
   
   
 
 
 
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22nd Sep 2012, 4:03 PM
If you are driving downhill, do you save gas by putting your transmission in Neutral, instead of having your vehicle in Drive?

Does this really Help Fuel Economy?


changed: NikMan (20th Oct 2012, 4:26 PM)
 
 
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11th Oct 2012, 3:09 PM
First simple guess would be that this is indeed true.

The engine isn't braking the car going downhill if the transmission is in Neutral. But the fact is that they still burn fuel. The amount of fuel burned at idle over, say, a couple of miles of coasting downhill is small, but it's still more than zero.

Older, carbureted cars would suck gas through the engine while coasting in gear, even if you turned off the ignition switch. But almost all modern (fuel-injected) cars turn the fuel delivery completely off when you lift your foot from the accelerator and fuel consumption is zero.

So if you're driving a modern fuel-injected car, it is best that you keep it in gear.

changed: podtalje (12th Oct 2012, 12:11 AM)
 
 
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2nd Mar 2021, 6:29 PM
I didn't know this information! Thank!
 
 
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2nd Mar 2021, 7:34 PM
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2nd Mar 2021, 7:34 PM
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