The temperature that is too cold for gasoline is a temperature of -40 F to -100 F depending on the specific blend of gasoline.
Gasoline itself doesn't freeze until the temperatures reach at least -40 F to -100 F, depending the blend of gasoline.
Although temperatures don't have to be anywhere near these cold temperatures to cause any major vehicle issues, as freezing of the gasoline lines and fuel system in vehicles mainly occurs when water condensation in the fuel tank turns to ice and not the gasoline itself.
While the gasoline in the tank, remains liquid, you can still have severe cold weather vehicle issues, which include, frozen fuel lines, thickened gas and if using diesel fuel, the diesel fuel can gel up.
Moisture will naturally build up in your gas tank through condensation during cold weather.
And when the temperatures drop below 32 F, the water turns into ice crystals.
Then these ice crystals can block the fuel lines or even clog your fuel filter, which prevents gas from reaching your engine.
As temperatures plunge well below freezing, the gasoline can also become thicker and force the fuel pump to work significantly harder.
If you drive a diesel fuel vehicle, the diesel fuel can also begin to gel at much warmer temperatures of between 10 F and 15 F for standard #2 diesel.
To prevent these issues with gasoline in winter or humid environments, keep your tank as full as possible, as maintaining a tank full or at least half full limits the amount of air inside, which also directly reduces the amount of moisture that can form and preventing condensation.
You can also pour a bottle of HEET into your fuel tank, which can help get rid of the moisture in the fuel tank.