I ran dry at 123 miles, but that's with a supercharger and hovering between 90 and 100 most of the time. I was trying to get home before I froze. I had no problem staring it when the wife arrived with the juice.
On my Ironbutt runs Id be pushing it to around the 185 mile mark, Id also carry a spare 5ltr can….but iv never had to use it ……YET.