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Originally Posted by Bebopp Gasoline floats in water, so the water will be at the bottom of the tank, not the other way around. As soon as you get water in the tank, it's the first thing that gets sucked in the engine so having either half or full tank doesn't matter. You need to avoid getting water in the tank in the first place. |
Sorry, I was having a brain fart (sometimes I get too much stuff in my head and it pushes some other stuff out...or it could be I was at work and had half my brain occupied). The fuel pickup, whether it is in a vehicle or a stationary tank (gas station) is above the bottom of the tank to preclude water ingestion unless the water reaches a certain level. That's why gas stations use something like this:
Water and Gasoline Finding Paste when they are sticking the tank to make sure the water level doesn't get to the height of the pickup (at least that's what they did last time I worked in a gas station...in the last century). Stirring up the tank by filling it or jostling it complicates things.
Fact of the matter is, unless you continuously top off your tank, you
will get air in your tank, which
will have moisture in it, which
will condense under the proper circumstances (this of course includes the stationary tanks as well). Fuel system engineers know this, and design to tolerate a certain amount of water in the system. Periodically using an absorber will reduce the accumulation of water in the system, as will periodic draining (usually reserved for extreme problems). Honestly, I can't remember the last time I heard of someone having a water-in-the-gas problem.