You can add diesel fuel additives like winterization additives or anti-gel additives to prevent diesel fuel from freezing in cold temperatures. These additives lower the pour point and improve cold flow properties of the diesel fuel to help prevent gelling and filter plugging.
heat it up, add energy to it
Salt lowers the freezing point of water. To prevent 100ml of water from freezing, you need to add approximately 6-7 grams of salt.
-25°C
Diesel freezes at the temperature of -2 degrees FAHRENHEIT
freezing?
if your talking about salt, it only adds friction and therefore grip for vehicles, it doesnt stop them freezing
Rubbing Alcohol
These data depends strongly on the chemical composition. For gasoline: the freezing point is from -40 0C to -60 0C For Diesel fuel: the freezing point is from -6 0C to -20 0C
You can't stop it but you can slow it down by freezing it.
If its a Diesel, its probably the Diesel Stop switch. Located on the Diesel Fuel Pump.
SALT