Why you Shouldn't Keep Pouring Gas When the Buzzer Sounds
Everyone who gets used to refueling their car knows that there is an unmistakable signal that means stop. We refer to that sound when the top reaches , that warning of the hose that cuts the fuel pump indicating that the tank is almost full. It is true that it could still go a little more and that many take the opportunity to leave a round amount of money on the screen. Today we are going to tell you the reasons why this practice is not good for the car or for the pocket.
We have already spoken on other occasions about how detrimental it can be to make the most of the fuel tank and now the opposite is the case. Refueling above the hose warning in most cases does not mean more fuel or more autonomy . To explain it, you have to understand the operation of gas station hoses, which detect changes in air pressure as the tank fills up.
As we said, as the fuel enters the tank, the air and the vapors exit through another conduit. Hence, sometimes that "clack" of the hose sounds at the start of refueling, because it drowns when the pressure on the outside is equalizing with the pressure on the inside. When the tank is full, what happens is that the fuel reaches the tip of the hose , the air cannot enter and therefore it jumps and stops pumping fuel.
If from there you take the hose out a little and continue to add fuel, you probably won't get to stay in the tank because there is a drain pipe that is in charge of throwing the excess for safety. Therefore, it would only add a few more cents to the bill and no kilometers of autonomy. Sometimes you could also be going out the hose and then coming back in because of the topic we've talked about before the air pressure.
It is not only about the loss at an economic level that it can mean for the user, but it can also have negative consequences for the car . Most current vehicles have a canister or activated carbon filter to evacuate the vapors emitted by the fuel and which accumulate in the tank. It is located at the top (that's why the gases go up), so if we add fuel up to that point, we could damage it.
That would translate into higher emissions and uneven operation. In any case, the warning of failure in the instrument panel would jump and it would be necessary to go through the workshop . It has been shown that this practice is not very useful and there are more drawbacks than advantages. Therefore, do not continue refueling when the hose stop sounds, your pocket will thank you.