You have to look at the whole trip, not just the momentary mileage while climbing the hill. Watch a trip average mpg gauge, if you have one. Try the methods and see which one costs you the least.
I can say that in the cars I've tested, 80% load and low rpm works best. It means slight acceleration, so I do a puuuuuuuuulse and mini-glide.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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