If they're not running dry, then I'm confused.
These guys are saying they got xxx miles from a tank of gas.
How do they know if they don't run it dry, or dangerously close.
There is no way to know exactly when it will run dry.

Are they just using, say, around 12 of the 13.2 gallons, filling up, and then mathematically computing how far they could have gone on 13.2 gallons if they continued to get the same mileage?

Need fewer troops to support.
Drive a hybrid.
Best tank 71.65 MPG.

Before this car I spent two years learning hypermiling on my 2004 HCH1.