Nearing completion on my 11.0 to 1 compression motor and looked at a couple of major gas stations in my area (Chevron and Union 76) and saw there super unleaded was 91 octane. I would like (or need) to run 92? or 93? octane with this motor without adding special bottles of boost at every fill-up. Is this possible in Northern California? Does one of the major gas company's still produce 92 or 93 octane gas for the masses?