What is premium unleaded?

Premium unleaded refers to a type of gasoline that has a higher octane rating, typically 91 or 93, compared to regular unleaded gasoline, which usually has an octane rating of 87. The higher octane helps prevent engine knocking and allows high-performance engines to operate more efficiently. Premium unleaded is often recommended for certain vehicles, particularly luxury or high-performance models, to ensure optimal performance and fuel efficiency. However, using it in engines designed for regular gasoline generally does not provide additional benefits.