All city, I get +/- 200 miles until I fill up. (I never let the tank run dry, I always leave about 2 gallons in) If I drive conservatively I have managed around 220+ again, all city. This is on a predator 93 tune.
On the highway 24-26 mpg.
93 will give you worse fuel economy if your spark advance isn't compensated for the higher octane fuel. Everyone tends to think that 93 has more chemical energy than 87 since sports cars use it. This is not true, octane is just a chemical compound that resists pre-ignition that would cause detonation or knock. With that being said though, I'm lucky to get 175 miles on a tank, Miami traffic is pretty horrid.