It takes regular gas.
Using premium is a waste of money and not required for this model. It is only required in the 2003-2003.5 turbocharged Mazdaspeed Protege, 2007-08 Mazdaspeed 6, 2007+ Mazdaspeed 3, Mazda RX-7 and RX-8, Mazdaspeed Miata(MX-5), and Mazda CX-7.