When does "empty" mean "zip-nada-zilch"?

[bobhamlin]

As some of you know, I'm transitioning to a '06 Nomad from a 1500 Classic (carb.)

Today's question: With the digital gas gauge, is there any indication when low gas is getting *really* critical?

On my analog Classic, when the needle moved completely over the "E," I had about 8 miles left. This morning on the way in, I got the yellow warning light with one digital bar remaining on the gas indicator. I began calculating, based on my average mpg, my expected range with a variable for commuter stop&go. (There's a stretch with no gas stations that provides a little pucker factor).

With my other bikes, the rule of thumb seems to be that the "reserve" is about 1/5 of the tank.

On the digital indicator--does the last bar ever disappear? If yes, is there any gas left after it does?

Thanks.