So ... funny story....
My rocket had been turning on the light and showing 0 miles to empty at around 130 miles. It usually had 2 gallons left in the tank, so when my light came on yesterday morning I ignored it.
Today, at 160 miles, I got the privilege of pushing the rocket, uphill, for about a 1/2 mile to the gas station. She took 5.97 gallons of gas in a claimed 5.9 gallon tank
R3R_Slip Tune and a heavy hand yield 8.6 liters /100 km or 27.5mpg (US).
TL/DR: When making right hand turns, if the bike stalls, you are about 1 mile from being OUT of gas!