I've gotten so I do most of my driving with reference to the pulse widths rather than the km/l. Since I know what the pulse widths are from idle to 2000rpm, the pulse width lets me know when the ICE switches over from propelling to engine braking the car, which results from only a very minute change in the accellerator pedal's position, especially when driving at lower speeds. This is where the hand throttle come in handy.
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