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Just a note, but you explicitly mentioned accelerating slowly in the article...don't do that. For better gas mileage, you should accelerate quickly thru the low gears, as the extra gas wasted in acceleration is more than made up by the extra mileage at a higher speed.
It may not sound like much, but I average 2-3 mpg over the gov't specs on my car on the highway...and that's traveling at 78-80 on average.