I filled up (the Bonniville) last night in the suburbs with 87 octane for $2.09/gal but here in Chicago $2.16 is common and the 93 octane for the Benz is about $2.30. There is an investigation pending for price gouging.
I still drive wherever I want in the 500 but it does make a difference. We have a Honda Del Sol and it seems to be vehicle of choice for longer trips.
95 Pontiac Bonniville SSE
96 Honda Del Sol