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 or require premium gasoline for optimal efficiency and power. Using premium gasoline can lead to improved engine performance and fuel efficiency, but it is generally more expensive than regular gasoline. While some vehicles may benefit from premium fuel, most standard cars, like those from Toyota or Honda, run efficiently on regular gasoline, making it unnecessary for everyday use.