MOVED TO RACING.
Folks there can better assist you.
Stick with the 93 octane. The high test stuff doesn't buy you anything at all with a stock configuration. You would need to go forced induction before you saw any benefit.
The down side is that the car will run hotter because of the increased volatility of the fuel.
FORMER Avenging Moderator of the Apocalypse and Leader of the Axis of Oversteer
"I live with fear every day and sometimes, she lets me race."
2002 SVT Focus... Stock