Is it okay to fill up the gas tank in hot weather?

1 Answers
DelColton
07/29/25 8:37pm
It is not recommended to fill up the gas tank completely. If the tank is overfilled, gasoline can easily overflow from the vent hole, especially when driving in hot summer weather. Here is some relevant information: 1. Danger of overfilling while driving: To prevent gasoline expansion from rupturing the tank, most fuel tanks have a vent hole designed at the top. If the tank is overfilled, gasoline can easily overflow from this vent hole, particularly during high-temperature summer driving. In such cases, spilled gasoline may ignite under high temperatures. 2. Risk of negative pressure: Overfilling the tank can easily clog the vent hole. If the vent hole is blocked, as the fuel level drops during driving, negative pressure can form inside the tank. This can lead to vapor lock in the fuel pump, resulting in poor fuel supply or even complete fuel cutoff.
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