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Old 02-16-2010, 04:45 PM   #1
bankrobber
 
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Coasting in neutral

Is coasting in neutral bad for manual transmission? I have been doing it alot. I usually pop it into neutral on my way home on a big hill where I can coast almost a mile where I have to stop and turn anyway. I was wondering if coasting would cause something to not get lubericated?
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Old 02-16-2010, 05:03 PM   #2
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Originally Posted by bankrobber View Post
Is coasting in neutral bad for manual transmission? I have been doing it alot. I usually pop it into neutral on my way home on a big hill where I can coast almost a mile where I have to stop and turn anyway. I was wondering if coasting would cause something to not get lubericated?

no it causes no harm


in a standard, no damage
in an automatic no damage

NOTE:
neutral will...
prevent DFCO from engaging and will wear out the brakes faster (no engine braking available)

but no damage whatsoever.
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Old 02-16-2010, 06:45 PM   #3
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If you coast in neutral with the clutch in, you're putting unneccessary wear on the throwout bearing. If you're going to coast in neutral, just be sure to let the clutch out.

Do look up DFCO, though. In FL, there really aren't many hills that are steep enough or long enough for you to benefit from neutral coasting. But, you can gain a lot from in-gear coasting with DFCO.
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Old 02-16-2010, 08:52 PM   #4
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Great, thanks for advice. I have always coasted a lot. I will keep the DFCO option in mind. I had no idea the Yaris did that.
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Old 02-16-2010, 09:15 PM   #5
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I thought using DFCO was more beneficial than coasting?

hmm.
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Old 02-16-2010, 10:07 PM   #6
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I thought using DFCO was more beneficial than coasting?

hmm.
It all depends on the scenario. If you only have a short distance to go, or want to drop speed over a shorter distance, then DFCO is the key. However, if there is a long way to go and/or you want to maintain as much momentum as possible then coasting is the key.

Hypermilers take it a step further and coast in neutral - with the engine off.
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Old 03-06-2010, 11:54 AM   #7
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I never had any problem with my car specially when i come home i have to rive in a hill too, and usually i used in neutral just keep in mind that you have to be careful...
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Old 03-11-2010, 02:46 PM   #8
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What is DFCO?
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Old 03-11-2010, 02:52 PM   #9
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What is DFCO?
Deceleration Fuel Cut Off. At above 1100 rpm (IIRC) with the transmission in gear and the throttle at idle position, it will cut the fuel completely, saving you the 0.16 gallons per hour normally used at no-load idle.

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Old 03-11-2010, 03:55 PM   #10
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Originally Posted by bankrobber View Post
Great, thanks for advice. I have always coasted a lot. I will keep the DFCO option in mind. I had no idea the Yaris did that.
Most, if not all cars use this... In gear, with foot off the accelerator, the injector solenoids will be shut off to save on fuel. The wheels will keep the trans, and therefore the crank rotating. If you pop her in neutral, the engine needs fuel to keep the engine at idle speed.
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