1. Damage the stock engine? No 2. Provide some acceleration performance improvement? Most likely a decrease in performance as the car is not tuned for that octane.
BTW- 50/50 of 92 and 110 octane result in a 101 octane fuel.
"The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art. There is no color that doesn't suit it. There is no mood-lifting chemical substance it can't replace." - Automobile Magazine