Understand; my question was how does one do this manually in between fill-ups? I often want to see how my driving behavior is impacting fuel economy or after a mod or tuneup etc...etc. Every other vehicle I've had, including the Tundra, allowed you to do that anytime you want. Thanks!!!
There are three displays that show MPG - "Average," "After Refuel," and "Current."
The "Average" display averages MPG continuously until it is reset. It can be reset anytime by scrolling to it and holding the "DISP" button on the steering wheel. After it is reset, it continues to average MPG until it is reset again.
The "After Refuel" display cannot be reset manually. It goes back to 0.00 automatically every time more than approximately 2.1 gallons (8 litres) or so are added to top off the fuel tank.
The "Current" display is a bar graph from 0-40 MPG which displays an approximation of instantaneous current MPG. This one is fun to look at when you are pulling a heavy trailer up a long hill