NW Indiana here, and I just saw in another thread that the premium fuel was about $0.20 higher than regular.  I was shocked, but recalled my younger days (10-15 years ago) when it was the same in central IL.  Now here in NWI premium is approx. $0.60 more expensive than regular.  This is 93 vs 87.  So how about ya'll? 

Il QC area can be 50 cents to $1 a gallon more for 91/93
gas prices for 87/89 can fluctuate by 30 cents a gallon from one place to the next
prices from moline to galesburg can be 50 cents different for a 45 minute drive
prices in Peoria are usually same as the Il QC. 90 minute drive

when I was first driving, 1985, gas was 78 cents a gallon

I hate buying gas, I'm pretty sure I'm getting boned no matter what I'm paying

when we drove to the NRA convention this year, I was surprised how gas pricing was very consistant from QC IL to Atlanta and back. (different routes each way)