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Old 12-10-2009, 08:43 PM   #4 (permalink)
Left Lane Ecodriver
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Join Date: Aug 2008
Location: Buffalo, NY, USA
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Prius C - '12 Toyota Prius C
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For most cars, as long as you can hold top gear, constant speed is fine. One step better would be full throttle acceleration in top gear on the way up the hill, and engine off coasting on the way down.
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