In my experience, with a manual transmission, the best approach is moderate-to-high throttle and LOW rpm. As low as you can manage. I shift at points where I land in the next gear at 1300-1500 rpm. That means I'm shifting at or below 2000 rpm.
The trouble is an automatic won't allow that combination. It holds a lower gear to higher rpm instead of allowing such open throttle. I believe the test results here, for an automatic, but my experience doesn't agree for a manual.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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