Picture this: you’re driving on a highway, and suddenly see something you’ve failed to notice earlier: your gas tank is almost empty! You drive to the closest gas station, only to find they have no other gas but 87. Should you pump it inside your car or not? What’s the difference between those numbers?

In fact, gasoline can actually be different, and it’s not one type fits all. In the US, the most typical numbers you’ll see are 87, 89, and 92. In other parts of the world, the numbers can vary, but most common ones are 91, 95, and 98. The higher the number value, the higher the cost of the fuel, so it might seem natural to choose the cheapest one and go with it, but it’s not as simple as it sounds.

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