Originally Posted by Cobb
The real time mpg is the bar graph that goes left to the right on the bottom of the average mpg read out.
Worthy of note: It's not always particularly reliable. I'm not sure how many miles per gallon equate to each bar on that graph, but it seems inconsistent. I can show a real-time usage around 60mpg, but my average will continue dropping, even though it's sitting at 48mpg. Not always, but sometimes.