Filling up at the pump is a daily routine for millions of motorists. However, the common practice of forcing a fill after the nozzle has been automatically triggered carries risks that are often overlooked. Here’s why it’s best to stop as soon as the pump stops by itself.
A safety system to be respected
When we fill up our vehicle, whether with petrol or diesel, the pump nozzle is designed to stop automatically once the tank reaches a certain fill level. This mechanism is not there by chance: it’s a essential safety system.
In spite of this, many drivers have developed the habit of continuing to fill their tanks by manipulating the nozzle to force the flow of fuel. This practice, although widespread, is not recommended for several important reasons.
The hidden dangers of overfilling
Contrary to what you might think, continuing to top up the fuel tank after the automatic shut-off provides little or no additional range. In fact, this “excess” fuel may never reach the main tank.
Modern vehicles are equipped with a overflow evacuation system which rejects excess fuel for safety reasons. As a result, any extra fuel you try to add is likely to end up being vented, representing an unnecessary waste and potentially dangerous for the environment.
What’s more, today’s fuel tanks generally incorporate a activated carbon filter in their upper part. This essential component absorbs and removes fuel vapors. Repeated overfilling can damage this filter, leading to malfunctions and costly repairs.
The complex composition of fuels
It’s important to remember that gasoline and diesel are complex mixtures containing numerous chemical compounds. In addition to hydrocarbons, they contain antioxidants, lubricants, antifreeze agents, etc. and a group of substances called BTEX (benzene, toluene, ethylbenzene and xylenes).
Among these components, benzene is particularly recognizable by its characteristic odor. These substances, although necessary for engine operation, can be dangerous if exposed for long periods or handled incorrectly.
Exceptions to the rule
There are, however, situations where the gun may stop prematurely, for example due to the presence of gas in the circuit. In such cases, it is indeed necessary to wait a few moments before resuming filling.
It is important to distinguish between these premature stops, which usually occur shortly after filling has begun, and the normal stop which indicates that the tank is full.
Tips for optimizing fuel consumption
To reduce the frequency of your visits to the service station, here are a few practical tips:
- Adopt a flexible, anticipatory driving. Avoid sudden acceleration and maintain a constant speed wherever possible.
- Regularly check the tire pressure. Correctly inflated tires reduce rolling resistance and improve your vehicle’s fuel efficiency.
- Plan your journeys in advance to avoid traffic jams and unnecessary detours. An optimized route can significantly reduce your fuel consumption.
By adopting these best practices, you’ll not only reduce your fuel consumption, but also help protect the environment and extend the life of your vehicle.
Filling up with fuel is a simple gesture, but one that deserves our attention. By respecting the normal operation of the pumps and avoiding over-filling, we protect our vehicle, our wallet and the environment. Next time you fill up, remember that the first “click” of the nozzle is there for a reason!
