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Old 05-09-2012, 07:50 PM   #3 (permalink)
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Originally Posted by Frank Lee View Post
Depends on if you want engine braking or not. If not, coasting in N of course is far, far better, engine on or off.
The subject is "The most efficient way to slow down".

Using no fuel is a more efficient way to slow down than using some fuel. So compared to idling your engine in neutral, leaving it in gear is more efficient to slow down.

If the aim was maximizing distance without fuel, then this might not be the case. But the subject is "most efficient way to slow down".

If the subject was to slow down with maximizing the distance you still travel, then this is another story altogether.
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