Octane Boost Additives

I only use the Race Gas octane booster only if I need race fuel and no place is open. Other wise I always get VP race fuel. The cost comes out to be the same after buying 93 and adding an octane booster to it. I am running a 50/50 mix on the street in a 505 with 12.4 compression, 200 psi cylinder pressure. So far its been running very good.