Quote:
Originally Posted by Billfitz
I'd say that when the tank is approaching empty it becomes a resonator, amplifying chassis transmitted vibrations to a higher than normal level.
Aside from strange noises you shouldn't let the tank go below 1/4, as it increases the potential for water condensation in the tank.
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That actually makes a lot of sense. The weight of the fuel essentially dampens the resonances the run through the car from the exhaust due to the proximity
I travel for work and sometimes try to get my work done before stopping for gas so I will let it run low just for the day and fill up when I get off work. But I agree that it's not a good idea to let the fuel run too low. And now, it appears I have a audible "reminder" under the car to let me know each time.
