Here much gas was in the tank before ?
Keep it out of boost.
Put 93 back in when most of this crap is gone.
Or put 93 in now and keep it out of boost till you know you have all 93 in there.
174,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. Also CHECK YOUR OIL, these cars use it.