I totally agree, I would never on a regular basis, run an automobile down to fractions of a gallon. As noted in my post, I filled up with an estimated 1.5 gallon left in the tank, by the trip computer calculations. My manual calculations have always been 0.2 to 0.4 lower than the trip computer calculation, but rather consistent.
What I do want is as accurate as possible true miles left to empty, without underestimating, in case I am ever in a bad situation - middle of the desert, middle of the night, and running low on fuel. I am the type that sets the clocks in the house to the exact second (in the MDX as well).
That is why I calculated to set the NAV trip computer to a -10 adjustment, seemed the most accurate from the data I was able to obtain. I do not intend to "test" my data by running it to zero.
What do others set there adjustment to?
Thanks for bringing this up to all - I think most would agree it is never a good idea to run the tank to fractions of a gallon.