Actually, by bounding box (a curved bounding box of course, since its on the surface of the earth), Thunder Bay lies nearly in the dead center, East-West wise, of Canada. Windsor is only about ~450km or less than 10% east of Thunder Bay, so calling this Central Canada isn't really a stretch.
Try an example of 100 miles:
100 miles at 10mpg = 10g. 100 miles at 20mpg = 5g. So, savings of 5g.
100 miles at 33mp ~= 3.3g. 100 miles at 50mp = 2g. So savings of ~1.3g. But 5g / 1.3g != five times the savings.
Roughly 3.5 to 4 times the savings (without breaking out the ol calculator).
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That's not exactly Central Canada.
Actually, by bounding box (a curved bounding box of course, since its on the surface of the earth), Thunder Bay lies nearly in the dead center, East-West wise, of Canada. Windsor is only about ~450km or less than 10% east of Thunder Bay, so calling this Central Canada isn't really a stretch.
Try an example of 100 miles: 100 miles at 10mpg = 10g. 100 miles at 20mpg = 5g. So, savings of 5g. 100 miles at 33mp ~= 3.3g. 100 miles at 50mp = 2g. So savings of ~1.3g. But 5g / 1.3g != five times the savings. Roughly 3.5 to 4 times the savings (without breaking out the ol calculator).