[nick666]

I thought the general consensus is that higher rpm=higher fuel consumption, but if it is so, then why does my onboard computer display show my fuel consumption decreasing with higher rpm when accelerating in same gear?

I can only think and explain that in terms of fuel delivery rate, lets say 2 ml of fuel/second is delivered when the pedal is pressed at 50% at 2000 rpm in second gear at 30 km/h , and rising to 4000 rpm=60 km/h but with the same amount of 2 ml of fuel being burned.

So why should I change at lets say 2700 rpm if the instant consumption decreases as it accelerates to higher rpm ?