Mazda recommends using unleaded gasoline for its vehicles, and the specific octane requirements may vary depending on the model and engine type. Generally, most Mazda models operate efficiently on regular unleaded gasoline with an octane rating of 87. However, for certain performance-oriented models, such as those equipped with turbocharged engines, Mazda suggests using premium unleaded gasoline with an octane rating of 91 or higher. It is essential for vehicle owners to consult the owner's manual for the particular model to confirm the correct fuel type and octane rating. Using the recommended fuel type can help maintain optimal engine performance and efficiency. For additional details specific to your Mazda, checking the Mazda website or the vehicle's documentation may provide further guidance on fuel requirements and recommendations.