Accord's are designied specifically for 87 octane. Putting in higher octane fuel will give no benefit. In fact, it might even REDUCE your performance. So stick with 87. This is what happens when you put premium fuel in an Accord V6. Same thing would happen with 4-bangers old and new as well...
Performance LOST by using higher octane fuel:
4 fwhp peak
10-15 fwhp through the mid-range.
Stick with 87 if you have an Accord
Originally posted by ShAg9yBrDr
i was also informed that it was actually bad for your engine to switch octanes. so once you start with something, stick with it!
Who told you this?

That's not true.