Some drivers always prefer to fill the car "to the top" - so as not to have to stop at a gas station once again. Others, on the contrary, never fill the tank because they think that technical problems will arise. But how likely are they really? The real arguments for and against filling the tank to a full tank come down to one main question.
Most often, opponents of filling "to the top" talk about the terrible vacuum that forms in the tank as it is emptied and which damages the fuel pump. But the truth is that modern cars (certainly all those produced in this century) are equipped with "smart" sensors and ventilation systems that do not allow the pressure to drop to a critical level.
The ventilation system stops working only when the gravity valve is activated - when the car is tilted at 45 degrees or more. This measure is necessary so that in the event of an accident the fuel can remain in the tank and not spill, increasing the risk of fire.
But in our country, as is well known, there are also older cars that do not have modern systems? It turns out that such a problem can occur in them? According to experts, however, these are also myths and legends. A critical vacuum cannot, in principle, form in any part of the fuel system due to its incomplete tightness - and it doesn't matter when it came off the assembly line: yesterday or in the 1980s.