[Porsche-O-Phile]

A couple of those old "aviation aphorisms" come to mind:

"An airplane will fly a little bit over gross weight, but it sure won't fly without gas"

"Three most useless things in aviation: Altitude above you, runway behind you and air in the tanks"

Also, "what's the first thing a guy does after declaring an emergency and landing in an empty field 'off airport' due to fuel starvation"? Answer: "switches the fuel selector onto the tank with fuel in it".