Driving up to a gas station by car, you probably choose the column, the hose of which is located on the side of the hole of your gas tank. Some cars have it on the right, while others have it on the left.
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This can sometimes be inconvenient. For example, a line of cars will line up on one side of a gas station, while the other side will be empty. It is not clear what prevented automakers from reaching an agreement and coming to a single standard at one time? Obviously, there are no fundamental restrictions that prevent you from placing the neck of the gas tank on the right or left. So what caused these discrepancies?
Why is there a gas tank on a car on both the left and right sides?
European automakers with left-hand drive models traditionally place the throat on the right. This is easily explained by the refueling process itself – in this position, the driver does not risk hitting the door on the gas station. And fuel vapors through an open, but maximally distant door, will penetrate into the passenger compartment more slowly. If refueling is carried out from a canister, on the side of the road, then the neck located on the right will somewhat secure this process – the driver does not have to stand on the roadway.
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It is logical that exactly the same reasons are the reason for the location of the hole on the left of the case in right-hand drive Asian cars. But if you start driving a right-hand drive car on a right-hand drive road or, conversely, on a left-hand drive car on a left-hand drive, then the convenience associated with the location of the neck will disappear.
And some Asian carmakers supply left-hand drive cars to foreign markets on which the throat is located on the left. And there is a logical explanation for this. Reworking the base model will entail additional expenses, and there is no particular point in this – hardly anyone chooses a car based solely on the location of the fuel filler neck. In rare cases, the fuel filler flap takes its place purely for design reasons, but this exception only underlines the universal rule.