i thought i had already posted this elsewhere in the forum, but i can't find it. maybe i didn't post it. hope my memory of the figures stands up if i find it after the fact
anyway, here's my wind story: on the 1000 km trip I did in late jan., i started off driving w/s/westerly along the north shore of lake ontario into a strong s/w wind (gusting 25-40 km/h).
at around 95 km/h i was getting 50-ish mpg (US).
the path to my destination took me around the western tip of the lake, and as the direction of the highway slowly arced through the eye of the wind and continued turning east and away from it, the mileage dropped, and then started climbing again.
now on the southern side of the lake, i got off the freeway to head for the town of Niagara-on-the-Lake
(where the niagara river flows into L. ontario), along about 10 km / 6 mi of dead level secondary highway (80 km/h) with a series of traffic lights scattered along the way.
with the wind now squarely at my back, i hit "reset" on the scangauge's average fuel economy function and watched as it bounced around briefly and then began to settle down somewhere in the high 60's mpg (US). astonishing.
in addition, i was able to pulse and glide a couple of the stop lights along the way, and by the time i reached my destination, if i remember correctly, the scangauge was resting steady around 73 mpg.