Many people believe that letting the fuel tank run empty allows the dirty fuel remaining at the bottom of the tank to reach the injectors and combustion chambers, this is why they always make sure to fill the tank before it runs out, Is this true?
This belief is false and has no connection to reality, the fuel pump in the tank pumps from the bottom, not the top.
Since dirt and water are heavy objects, they will sink to the bottom, where the pump pumps the fuel mixed with impurities and water and sends it to the injectors and combustion chambers. This can cause problems for the fuel and combustion system.
There is no specific level for filling your fuel tank. It depends on the cleanliness of your vehicle’s fuel tank and the gas station you fill it at, dirt and water in the fuel come from the gas station or through your tank’s filler port.
Maintaining a slightly higher level may protect the fuel pump from damage and, God forbid, from a car fire, field experiments have proven that some cars catch fire due to a lack of fuel in the tank, of course, you’ll wonder how this is possible?
Some car models, such as the Dacia Logan and Renault Symbol, as well as some Chinese and European models intended for poor countries, have poor interior quality.
Some models lack a safety record, which is why some of the aforementioned vehicles are prone to fires due to the fuel pump’s electrical connection in the tank burning out due to overheating.
Two pipes typically exit the fuel tank: one supplies fuel to the engine, and the other returns excess fuel to the tank. This causes the pump to float in fuel.
If the fuel level in the tank drops to the point of exhaustion, the fuel stops returning to the tank because the engine is consuming all of the fuel.
Therefore, in some cases, keeping a significant amount of fuel in the tank lowers the pump’s temperature and prevents any sparking or explosion, God forbid, in the tank.
This is similar to the process of cooling a car engine with coolant; the fuel returning to the tank cools the pump and electrical connection.
When should we fill the fuel tank?
The best time to fill your car’s fuel tank is in the morning, especially during hot or summer months, because the temperature is lower than the rest of the day.
The fuel temperature rises, and the fuel tank contains vapors and gases. This causes the pump that fills your car’s tank to mix fuel with air and vapors, reducing the amount of fuel in your tank.
A gas station has large tanks containing gasoline or diesel, the high temperature contributes to the evaporation of fuel, creating volatile vapors and gases that can be pumped by the filling pump, this reduces the amount of fuel you fill, even if you fill the same amount as usual.
