My advice for what it is worth is:

As well as being concerned for the future of the earth, I believe the members of this site are also sensible of their duty to their fellow man. That said , to run out of gas on any part of any road can cause a serious hazard to others!

If I was a police officer and I came across you having run out of gas and if you had passed a gas station in the past 60 miles I would charge you with driving without due care and attention!

With the HCHII you get two warnings - one at about two bars remaining, the other when the last bar goes out.

To go further to try for some ridiculous personal record is in my view criminal!