What Did You Do With Your Truck Today ?

[agnes the dog]

It's water vapor that comes from the moisture in the air above the fuel that condenses when it gets cold. Since fuel is lighter than water, the condensation settles in the lower part of the tank or fuel line where it can freeze. It's always a good idea to keep a good amount of fuel in the tank especially when it gets really cold. The condensation comes from moisture in the air above the fuel (mostly). If you limit the amount of air above the fuel, you are limiting the amount of moisture in the system. The antifreeze additives are made to absorb the water in the system so it can't freeze.