Does a Full Fuel Tank Affect the Car?
2 Answers
Filling the fuel tank to the brim does have an impact on the car, mainly including increased risk of safety accidents, clogging of vent holes, damage to the carbon canister, and generation of odors. Relevant information is as follows: Unsafety: A full fuel tank is also relatively unsafe for the car itself. From the design of the fuel tank, it can be seen that when gasoline is filled to the maximum, it is almost overflowing. When driving over uneven road sections, it is inevitable that the fuel tank cap may not be properly closed, and fuel may slowly leak out. On normal roads, this may not have much impact, but in the event of encountering an open flame, it is very easy to cause a fire hazard. Secondly, filling the fuel tank too full can also create excessive internal pressure, leading to less smooth fuel supply. Clogging: Filling the fuel tank too full can block the vent holes, causing an imbalance in the internal pressure of the fuel tank, which in turn leads to malfunctions in the car's fuel supply system. If the fuel supply system malfunctions, the car may experience difficulties starting and abnormal shaking during acceleration.
I worked at a gas station for several years before, and honestly, filling up the fuel tank completely does affect the car. The main issue is the increased vehicle weight – a full tank adds around several dozen kilograms to an average family car, equivalent to carrying an extra passenger. This noticeably increases fuel consumption during acceleration and uphill driving. Additionally, extra caution is needed during hot summer weather as gasoline expands when heated and may overflow through vent holes, creating unpleasant odors and safety hazards. Moreover, consistently filling the tank stresses the charcoal canister, which is designed to absorb fuel vapors. If it fails, you'll notice a strong gasoline smell inside the car. From my experience, filling up to three-quarters capacity is optimal for daily use, reserving full tanks only for long trips – this balances safety and fuel economy.
