Thank you, Steve_M!
I would never have suspected the printed Guide would have less content! It might actually be more easily readable if they had not removed anything!
Just as you have posted, here from page 146 of the 23YM Manual ;
"Shows the average fuel economy for the last three driving cycles (1-3), and the current driving cycle (0) in l/100 km or mpg.
Each time you set the power mode to ON, the display is updated, and the oldest record is deleted."
The current driving cycle makes 4 cycles displayed in total.