Your Gas Station Has Three Fuel Grades. So Why Does It Only Have Two Fuel Lines?

After all, why would a gas station offer three different grades of fuel if it didn't have three different tanks? Despite offering three fuel grades at the pump, most gas stations only store two kinds of gasoline underground: regular and premium. Here's How It WorksWhen you select regular gasoline, the dispenser simply pulls fuel from the regular storage tank. Here’s how it works:Most gas stations only have two underground gasoline tanks: one for regular fuel and one for premium. That's why service technicians opening a fuel dispenser will often find only two fuel lines feeding the pump instead of three.