City:
Personally, I P&G in the city with my small car. I think I get about ~5MPG out of that. I'd have to force myself to drive back in my old ways to confirm, but I used to get less than 30MPG I recall (lost my gas log spreadsheet
). Now I'm like 35MPG.
Highway:
On highway with my bigger CR-V, I just use cruise control on flat grounds, even uphills, and coast in neutral in downhills or in gear if the slope is too steep. Since I don't have DFCO with my CR-V, optimal is drving neutral on like 5% grade downhill at high speed, to reach like 210MPG while it lasts.
P&G doesn't really work on highway with the CR-V, it decelerates too fast. I could try to do it staying in drive (it's an auto).
P&G seems to work with the smaller car but still totally impractical to do on long drives.
Downhills:
Last week-end I drove down from Tahoe, CA to Placerville, and averaged almost 40MPG with the CR-V (About 60 miles), with a lot of neutral coasting, and some smart driving, not passing people when it was pointless, but aggressive when the road divided. For info, on flat HW my CR-V averages 25MPG~26MPG with my driving style.
ryandpotter 
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