That's were I stated "at unknown efficiency" in the MPG formula. You could use both sums of the formula's to get how much fuel was burned (MPG) at different MPH though. You can get duty cycle with a Consult progam, It shows the values at real time. The duty cycle refers to how much of the injectors potential is being used. You would have to average it and try to hold a steady value as it fluctuates in a wide band easily.
I do not fear what the future holds for me, I am not afraid to die.