Oh, and about the fuel additives...

Go to your local Sherwin Williams, and get some xylene...or toluene and add about 1/2 gallon. ( its expensive though). xylene before toluene if they got it. Remmeber, add it only when you have 1/4 left...and don't let it sit in the tank without 93 octane.

That should raise your octane a little ^_^