I would add "Don't drive like your ass is on fire", trouble is that it is hard to quantify the technique, because I can't drive like a 'normal person' anymore to compare. I do know that our Camry used to get about 25MPG +/- 2MPG, and with my change in driving technique I have had two tanks in a row of 33MPG, which is a 32% improvement.
Also, because people's driving techniques vary so much, it's hard to single out changes. Though, it is easier in an auto, because there is less that the driver does to change things.
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