If you happen to have an OBD-II diagnostic tool, you should be able to
monitor for knock retard/knock sensor counts to see if the PCM is
retarding timing or not with the 91, I think. That should help take out a
lot of guessing. I'm going to Autotap some WOT runs on my Corvette soon
to see if it's retarding, just for curiosity's sake. The owner's manual
only calls for 91, but it was nice to have that buffer in the past. Oh
well. :|
Jason
On Fri, 24 Aug 2001, Michael R. Clements wrote:
> Grin well taken. The difference is slight enough, I'm not sure it would show
> up in a 0-60 run or a 1/4 mile time, let alone on an autocross where one is
> traction limited most of the time. The official word from Joey McBride at
> Panoz was that 91 octane will not make a significant difference in
> performance. His only concern was the fact that fuel oxygenates have a
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