I have to travel 1 hour each way to get my avgas, just worked it out into US $ and it is about $6.50 per gal your money I'm paying, I pick up a 44 gal drum each time. We can get 98 pump unleaded here no problem but the cars (12-1 strokers) and the Harley love the avgas, lead is lubricant for your guides as well.

My 440 Stealth heads and 12.5 Ross domes.I run 93 on the street but cant really get into it.When I use race gas I can get by with say 2 gallons to about 6 to 8 93.Now if I race i usually have close to 80 90 % race gas in it.Rocky

hers a great mix calc if you go that route.
http://wallaceracing.com/octane-mix-calc.php

Just an FYI, around me I can get Sunoco 112 for about $.50 more a gallon then 110 and it takes less of a mix to get more octane.