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Old 05-19-2014, 06:33 PM   #347
sato
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Quote:
Originally Posted by daiheadjai View Post
Actually, coasting in neutral has a few disadvantages:
1) It wastes gas, because your fuel injectors must now feed fuel to keep the engine running (idle) - if you leave it in gear and coast to a stop, your wheels will turn the engine (keeping it running, and allowing the injectors to stay off).

2) It can be dangerous - not being in gear leaves you vulnerable in case someone behind you doesn't stop/slow down - at least you are in gear so you may have enough power to move out of the way.

Side note: Leaving it in gear to decelerate doesn't harm your car - I think what people advocate against is constantly downshifting in order to engine brake to a stop. If I coast to a stop in 3rd (and leave it in 3rd), there is no harm to the transmission or clutch.
To add to #1:

I'm not sure if this applies to this car, but my current vehicle does not add fuel while coasting until lower than 1500rpm. Thereby, only pumping air and saving fuel, which is also perfect if you are.going downhill for a long while.

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