Actually, I've seen octane as high as 98 in New Jersy (I'm in VA). You'd think higher octane would be better but from what I've read, that is not always the case unless the ECU is modified to take advantage of it. In fact, the older the car (before computers took control) the more likely it will be that higher octane fuel will have an impact. In mordern cars, sure, there will be a noticable difference between 87 and 98, but if you really want to see the difference between 93 and 98, you'd need to modify your ECU in order to really tell the difference. Anyone have real world experience with this?