Should I keep my gas tank full in the winter, so it does not freeze?
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Should I keep my gas tank full in the winter, so it does not freeze?
Yes, but not so it doesn't freeze. Alcohol absorbs water so since most gasoline sold today is either 5% or 10% alcohol, you probably don't have much if any water in your tank. A half tank of fuel will collect moisture from the atmosphere and eventually your performance will suffer. Also, if everyplace is closed due to heavy snow, you have a full tank and can last out the storm. Get stuck and you have enough fuel to keep yourself warm until you can get out.
If you're really worried about it, you can get a bottle of Heet which is alcohol and will absorb moisture. Any alcohol will work but NOT rubbing alcohol as it has water added and can't absorb anymore.