The difference he is not mentioning, is he couldn't have parked at the bowser with the nozzle in the car and pumping fuel while he went for a pee, the consul attendant (if they were awake) should have stopped the bowser as soon as the vehicle was unattended.
OK, add the co pilot staying with the vehicle while it filled with fuel, then doing their pit stop ...... as if they would rush the process in an attempt to prove something, they would do the usual 10 mins min in the restroom, followed by ordering something to eat and a coffee, then waiting for it to be prepared, then wandering out to the vehicle.
Sure, the tank would be full, the driver having been inside to pay for the fuel and back out now, having moved the vehicle away from the pumps to avoid generating bowser rage ..... and maybe have time to tap his feet in frustration ..... but I doubt he would dare say anything, because the co pilot would have bought something for them ..... if not, the next section of the journey is not going to be pleasant at all, complete with his stomach asking why he didn't get something while they were waiting ......
Now the time frame is closer to the recharging time from 20% to 80% and the co pilot will need a nature stop by then, even if he doesn't ...... nonsense argument destroyed by a reality check ......
T1 Terry