Octane grades

In terms of octane, some countries express octane as the AKI or (RON+MON)/2. These countries are Brazil, Canada, Colombia, U.S., Mexico, and countries that import fuels from the U.S. or follow ASTM standards, such as Caribbean or Central American countries: Barbados, Belize, Curaçao, Dominican Republic, El Salvador, Guatemala, Honduras, Jamaica, Nicaragua, and other smaller Caribbean islands.

The rest of Latin America expresses octane as RON.

In general, based on each country’s gasoline specification regulations, there are four grades of gasoline sold in North America: