I believe the total mileage used to appear on the start screen of the app, but I don't see it there anymore. I found it under Trip Data.

Looking further, I see information from reset. I have never reset the trip data. It shows the Distance Traveled basically equal to total Mileage, the Average Speed of 31 mph, and Average consumption of 61.9 mpg. My question is can the latter number possibly be correct? We don't really pay attention to mpg, but this seems quite high. What do others see?

 

Reset it and let the computer calculate again?