This evening I ran into a guy I sail with (against), and he just got back from a big tour taking his family to visit relatives in Thunder Bay, Ontario (west end of L. Superior) driving something like a Montana minivan.
He said that before he left, he hit the 100+ driving tips list and made some mental notes.
Result: best highway trip fuel economy to date, mostly by reducing speed, accelerating more carefully (automatic), using N on downhills, and generally paying more attention (anticipating).
I offered to lend him my
ScanGauge next time he's taking the family on the road again.
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Also rode to a family reunion with an aunt & uncle, and he's dropped his highway cruising speed by 10 km/h (to about 108). He thinks drivers have generally slowed down on the roads.