It was my understanding that and engine could only take advantage of a certain level of ocatane before it stopped making a difference (would differ between engines of course) ...anyone say different??
I hear ricer friends talk about "Japan Spec" engines all the time, there has to be a difference.
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89 5.0 GT White w/Blue Racing Stripes
K&N, 73mm Mass Air, Ported and Polished Stock Heads, E303 Cam, MAC equal Length Headers, Off Road H-Pipe, Borla Mufflers, 3.73's Sway Bars, Strut Tower Brace, Subframe Connectors, Eibach Springs, Koni Adjustables/Reds, Pony 5 Stars, 1000 Watt JL Audio System, No P/S , No Smog Pump
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