actually what kind of gas you use significantly depending on your driving style. if you just cruising around at low rpm all day, probably regular/plus will serve you just as well as premium. if you like to hit the red lines and hear the engine sing like I do, premium is the only choice.
when engine is working harder, fuel is more easily to ignite we all know that. you surely dont want the fuel to pre-ignite causing a knock.
its like engine oil. why M3's with higher red line uses thicker oil to compensate the heat?
2009 Mazda RX-8 R3
2013 Toyota FJ Cruiser
2008 YAMAHA YZF-R6
Last edited by jasonbimmer; 04-09-2012 at 10:53 AM.