Is It Okay to Fill Up the Gas Tank in Summer?

1 Answers
SanReed
07/28/25 8:34pm
It is not advisable to fill up the gas tank completely in summer. Here are the specific reasons: 1. If the tank is overfilled, gasoline can easily overflow from the vent hole, especially when driving in hot summer weather. 2. Overfilling the tank can also easily clog the vent hole. 3. If the vent hole is blocked, the fuel level will drop while driving, creating negative pressure inside the tank. This can lead to vapor lock in the fuel pump, resulting in poor fuel supply. 4. If the tank is overfilled (to the point where gasoline is visible at the tank opening), the vent outlet may become submerged in gasoline. In this case, liquid gasoline instead of vapor enters the charcoal canister, which can damage it.
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