Unless you car is built to use the additional octane (due higher compression and/or aggressive timing lead), putting high test in an average compression engine does nothing more than drain your wallet. If you car runs fine on regular or 93 octane, don't bother with race gas. Now if your combo is on the fring of detontion and you have to back off timing to keep it alive, than the higher octane gas will help, a lot.
I will also admit that the smell of exhaust on race gas is much nce than regular gas though.