Premium gasoline is a type of fuel that has a higher octane rating than regular gasoline. Typically, it has an octane rating of 91 or higher, which helps prevent engine knocking and allows for better performance in high-compression engines. Many luxury and sports cars, such as those made by BMW or Porsche, recommend using premium gasoline to achieve optimal efficiency and power. While premium gasoline can be more expensive than regular options, it may provide benefits for certain vehicles. However, most standard cars do not require premium fuel and can run efficiently on regular gasoline, which usually has an octane rating of 87. Choosing the right fuel depends on the manufacturer's recommendations for your vehicle.