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Originally Posted by bikenfool
Sure, but let say you slow down your constant speed target just a little bit, so the time to destination is the same with either method. Then you will use more on the climb, but use less the rest of the time.
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I think you can still beat constant speed (cruise control style) driving with DWL, and still have the same time to destination. The lower average ascending speed of DWL is offset by the higher than average speed by the bottom of the descent. (I'm assuming that in the constant speed approach, there is higher manifold vacuum to hold speed on the downhill part.)
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If the hill is steep enuf you can coast.
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True. And that's more efficient because now we're effectively talking about pulse & glide.