[dcb]

Ya lost me. The BSFC chart is useful for acceleration. So you know how much throttle to give it and when to shift to keep it in the "sweet spot". It is your job to conserve the energy that went into that last acceleration by not over accelerating into a heavy breaking situation. So get off the gas in time to coast to the next traffic obstruction, or feather the throttle as soon as you are up to speed, or p&g the whole way.

For cruising you can use it to determine the optimum gear ratio for an anticipated load at an anticipated velocity, but that obviously isn't for everyone.