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My expectations are high because people aren't generally motivated by altruistic things like saving the environment and being efficient. They are motivated by cash. If they are looking at a $15K car that gets 40mpg with all engine or a $40K hybrid vehicle that gets 50 or 60 mpg they are going to choose the $15K vehicle. It would take you years of fuel savings to make them equivalent financially and most people just do not keep their cars that long.
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