I never let my tank get below 1/4 before stopping at the next station, running 87, and wouldn't you know it, my gas light came on twice between Minneapolis and Denver, taking 35, then 80, then 76. I was pulling a LOADED 5x8 enclosed Uhaul. I got lucky twice. All it takes is for one station to be closed to leave you stranded, so I wouldn't get below 1/3 on the tank, or bring some extra. OK hope this helps, because running out of gas really really sucks.