What are common octane ratings of gasoline sold at the pump?

Common octane ratings of gasoline sold at the pump typically include 87 (regular), 89 (mid-grade), and 91-93 (premium). In the United States, 87 is the most widely used for standard vehicles, while premium fuels are recommended for high-performance engines. Some stations may also offer specialized fuels with higher octane ratings for specific needs. Always check your vehicle's owner manual for the recommended octane level.