"We never fill the cars with gas until they're at 1/4 full. Topping-off is one cause contributing toward gasoline shortages."
Good way to trash your engine rather quickly, as it encourages condensation on the inside of your gas tank, which mixes with the fuel, and causes your engine to run poorly. Better put some Heet in there if you intend to follow that practice for long. Better yet, fill it at 3/4th of a tank, and avoid the problem. Not to mention that if you need to leave, suddenly, you'll be able to do so. Even my 40mpg VW Golf won't go all that far on a quarter tank.
Oh well. Nervous nellies everywhere. The Vette runs fine on 94 octane that gets FILLED UP when it runs down to 1/4 tank. The same is true for my wife's Beemer.