Dave;
For us poor folks down here in Louisiana the norm is 87 octane for unleaded (today's average price $1.30),89 octane for unleaded + (about $1.39) and 92/93 octane for premium gas (about $1.50 or so). What I can not understand is here in Louisiana we are in the top 10 if not the top 5
oil produceing states and have tons of
oil refineries within a 2 hour drive of my house and still pay higher gas prices than some states that produce a lot less or even very little
oil.
Racing fuel is only available around here at race tracks generally from $3.50 to $4.00 per gallon. AV gas is around but they do not like to go pump a few gallons in a container for you unless you are buddies with someone at the airport or bulk plant.
So that's why we mess with additives so much,lack of high octane gas and cost when you do find it......
Remember,refer to my statement about large and small fortunes and you get the idea.......
David