2004 to 2020 Mazda 3 Forum and Mazdaspeed 3 Forums banner

high octane

  1. 2004-2009 Mazda3Appearance & Interior
    i was wondering if anyone is running higher than the recommended octane in the 04-09 2.3L mazda 3 motors? i am looking for feedback on this as i seem to find something odd. when i put 93 in on accident last fill up, it seems to be a bit more responsive and seems to be getting better mpg.i have...