Quote:
|
Originally Posted by 70Sixter
The other reason to fill the tank is to keep condensate from forming and mixing with the gas. Especially if your fuel has enthanol in it.
Also a reason not to run the tank dry as water is "heavier" than gas.
|
Water is more dense than gasoline. When it separates from gas, it settles to the bottom of the tank. The fuel pick-up is located near the bottom of the tank. Any water that separates from the gas will be pulled into the fuel system whether the tank is empty or not.
The reason that keeping the tank full is a good idea is to keep the amount of air in the tank to a minimum. Air has a harder time keeping water in suspension than gasoline, so when the temperature of the tank drops, more water will fall out of suspension from the air than it would from the gas. Gas can and does hold water in suspension but can only hold so much at any give temperature.