93 or 100 octane

[steven choi]

I just found a place in woodside, ca, a 76 gas station that sells sunoco race fuel 100 octane. Filled up my 2004 boxster S. And definitely feel the differences in performance accoding to my butt.
It was $4.39/gallon... a dollar more than 91 octane.

my question is since porsche recommends 93 or higher, will 100 octane gas deliver more performance than 93, or not.
My plan is, each fillup, to put four gallons of the race fuel (100 octane) and 12 gallons of the premium gas(91 octane). That comes to around 93 octane combined.

thanks for any input.