Shouldn't You Fill Up the Gas Tank Completely?

[DelValerie]

You should not fill up the gas tank completely. Here are the hazards of overfilling the gas tank: 1. Increased fuel consumption: A full tank increases the vehicle's weight, leading to higher fuel consumption. 2. Damage to the charcoal canister: When the car is bumpy, fuel can easily enter the charcoal canister. The impurities in the fuel can clog the canister's filter, affecting the air-fuel mixture ratio in the intake manifold. 3. Fuel overflow: Gasoline expands when heated. Although the tank has a charcoal canister to absorb vapors, overfilling can still cause fuel to overflow. 4. Insufficient fuel supply: Overfilling can block the tank's vent, creating negative pressure inside the tank, which may result in insufficient fuel supply to the engine.