[fidalgoman]

You know the engine mapping control guide would give you a very good idea of what loads and speed ranges give the best efficiency. Don't products like ScanGauge read the computer map and interpret it into real world instantaneous MPG? A little practice and knowing when to shift would be all it takes to optimize FE.

I know from experience when you mash the pedal down hard and see FE go into single digits or low teens for a second it really gets your attention.