RE: does it REALLY need 89 octane?
Well... you can use 87 or 89 Octane, but why not just put 91 Octane and get most out of your engine performance. I may use 89 Octane on a long road trip or if that is the only one I can choose. nothing but 91 Octane for me, cost about 10-cent more, why not. [8D]