Originally Posted by GregMN

I can tell if I am currently getting better or worst mileage then the mpg display by observing whether the range is going up or down.
If the range is rising, I know that I am currently getting more mpg then the displayed mpg and it will eventually go up.
If the range is falling, I know that I am currently getting less mpg then the displayed mpg and it will eventually go down.
If the range is steady, then I know that I am no longer getting better mpg than the displayed mpg.