Runs absolultey fine, no stumbles, no pinging, just runs great. I always use to put 93 in it, 2nd tank of 87 and it works great.

 

Just like I said on the other board, if you run 87 in the hot summer, I can guarantee you that you'll end up getting 10 degrees of knock retard, or more. Hook it up to a scan tool if you don't believe me. I've seen my own car get 3-4 degrees of KR in the higher gears using 89 octane in 50 degree weather.