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Originally Posted by SmOoTh!
Can I pulse&glide without stopping the engine? Can it save fuel, too?
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Yes, and yes.
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Is always coasting in neutral better than "deceleration fuel cut-off"-mode?
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Yes.
While you don't use fuel while using DFCO, you've burned fuel for longer than you should have.
Check your idle fuel consumption, it'll determine the minimum speed you can coast with the engine on, and still save fuel over your average fuel consumption.
For me, fuel consumption goes above 47mpg around 6mph / 10 kph.
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(ok, when a traffic light turns to red, "fuel cut-off" is better)
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You should switch between techniques, and pick the most effective one in a given situation.
Use coasting when you have a long way to slow down or stop; DFCO when you have to stop or slow down a bit quicker .
Brakes are the last resort.