We've all been there (I think). Low fuel warning light is on, and we wonder how far we can stretch it.
An immense sense of satisfaction can come from being able to run the tank down to near empty, almost like cheating death.
The popular Seinfeld episode where Kramer takes a dealership car for a test drive and "goes below the slash" springs to mind often when I am pushing a car to its effeciency limits.
A word of warning however. Not all fuel gauges give accurate readings, and once near dry, sometimes the gauge may indicate you have fuel, when in fact you don't.
Regards
@gio6