Quote Originally Posted by Embrey View Post
90 wont hurt it, but theres no benefit to it either. actually it may lose a little power. probably not enough to notice though.90 is just more resistant to burning that 87.
From everything I've read that is exactly right, the higher octane burns slower, Not hotter. One of the side effects of using higher octane in an engine not rated for it is carbon build up. That is a pretty big difference than what was stated earlier in the thread.