[Gerry Zagorski]

Couple important things about flow scans.

They usually do take a few fill ups to get dialed in

As I mentioned before you need to know your useable fuel. In other words, your tank is 100 gallons but not all of it is useable. Once you get down to the bottom of the tank, you could have several gallons left that your fuel pick might not be able to reach.

Digital interfaced to a gps is the way to go. The user interface on the gps gives you all the information you will need at a glance. One thing you need to remember here is to make sure and turn your gps on every trip. If not, your range to empty could be off.