Gas miles per gallon computation on Avalon 2003

[maun]

Is there anyway to reprogram the computer regarding gas mileage where the computer resets after each fillup? I would like to reset the computer when I want/need. I know that there are two areas of gas milege computation and both only use the since most current fill up or since the last stop as the basis of computation. I would like to use cumulative say for the last month or 6 months.

[yotatechie04]

I thought that all Toyota vehicles with digital Odometer have the trip-odometer that you can set, and reset whenever you wish by pushing the button and holding it in the instrument cluster...but maybe that's not the case here...

[WissNX01]

Um, check his profile, that will tell you why he wants the ECU to do all the work. Hes a government worker, and mostly people in government are lazy underacheivers.