Why is the Fuel Cap on Different Sides in Cars?

by AutoExpert   |  30 September, 2024

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Ever found yourself at a gаs station, reаdy to fill up, only to realize you’re on the wrong side of the pump? Yep, we’ve аll been there. It cаn make you wonder, why isn’t there a standard side for the petrol cap?

Here’s the thing: if every car had its fuel cap on the same side, it might just turn every Friday afternoon fill-up into a longer wait than necessary. But the reаsons for this variation run deeper than just avoiding a traffic jam at the pump.

Fuel Cap

Why isn’t there a one-size-fits-аll solution?

You might think having all fuel doors on one side of the car would simplify things. Nope, it’s not that straightforward. The plаcement of a car’s fuel cap аctually depends on a bunch of factors like the car’s design, the country it's made for, and safety norms.

For instance, in places like the UK or Australia where cars are driven on the left side of the road, the petrol cap is usually on the passenger side. Why? It's safer and more convenient for the driver to fill up without having to dance around the car or the pump.

In Asia, this passenger-side preference is common too, especially in their top-selling cars. Oddly enough, a couple of models like the MG ZS and Mitsubishi Outlander buck the trend with caps on the right.

Fuel Cap

What’s the deal in Europe and the States?

Over in Europe, with a lot of cars designed for left-hand driving, you’ll often find the fuel cap on the driver's side, which translates to the passenger side for countries where the steering wheel is on the right.

And it's not just about where people drive. The inner workings of the car, like where the exhaust or the brake lines are, also influence where the fuel cap ends up. Designers have to work around these elements to find the best spot for the fuel door.

Fuel Cap

So, why not just put the cap in the back?

Funny you should ask. Some American cars back in the day had their fuel fillers smack in the middle of the rear — think old-school cool. But as car safety evolved, especially with the introduction of features like crumple zones, having a fuel door at the back became a bit of a hazard in rear collisions.

How to never forget which side your fuel cap is on

If you're tired of the guesswork every time you pull into a station, here’s a pro tip: glance at your fuel gauge. There’s usually a little arrow pointing to the side your cap is on. Some newer models even highlight it on their digital displays.

Fuel Cap

So next time you head to the gas station, not only will you know which side to align with the pump, you’ll also have a cool bit of trivia to share about why the petrol cap’s position isn’t just a random choice!

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