plans on adding an instant
reader to every new Nissan and
it sells by 2010, and the meter is already available Stateside in the Altima and G35. The gauge is being added to show drivers how to drive with reduced fuel consumption in mind, and Nissan thinks owners can achieve 10% better fuel economy after using the gauge to adjust driving habits.
As an owner of a Volvo S40 with the same feature, I can personally tell you it works. My fuel economy went from 24.5 MPG to 27 MPG within a couple weeks of discovering the feature, and all it took was more coasting before stop lights, and less heavy acceleration from a stop.