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I only pulse-and-glide in light traffic. In moderate traffic, I try to P&G within 5 MPH, but I would probably be better off maintaining 55 MPH or whatever is noticeable. If I can, I accelerate from 50-70 as hard as I can without my automatic downshifting, shift to neutral, and coast back down to fifty. I should do an A-B-A to see what kind of difference that actually nets me, because I do not think that it is big, while I am pretty sure that using cruise control on level ground would be a great deal easier on the system.
The Phoenix area is very flat. When I drive out-of-town, when going up a steep hill, I accelerate as hard as I can without the automatic downshifting, although that would be too fast on a moderate hill. If hill goes back down on the other side, I usually start coasting before I crest, because I can accelerate 40-50 MPH in neutral. Once I am going faster than I want, I shift back into gear, and downshift, if necessary.
I often weave all over the road, changing lanes when there is a car behind me, but not in the next lane, although if someone starts tailgating me, I shift to neutral, move to the right side of the lane, and wait for them to pass me.
If they honk, I coast in-gear.
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