Yeah i do see that. Id be happy if my car read accurately and got appropriate mpg. Im just tired of having to record data for them every time i get in vehicle.Engineer and Rep will of course have different perspectives on this. I think like the former and would want to steer discussions that way if possible just like someone else may want it another way.
DTE is a software calculation for sure from mpgs you are getting. Needle should be more accurate and I assume from a tank sensor.
If you look through the thread, a lot of arguments are based on DTE. Not all, but many.