[FrodoGT]

Go for a b18a/b. its non vtec but will have alot more torque than your setup and can be found very easily for cheap. Also, since its a b-series if you ever decide that it just idnt enough "oomph" you could easily swap a b16 or b18c in with minimal changes like the ecu and 4 vtec wires.

As far as mpg goes, my b16 crx with no ac at one point got 20-24mpg but after getting the wiring straightened out and with a little highway driving it hit 31 mpg every tank for about 10 tanks till I sold it..and I drove it like a bat out of hell. Now to compare, my hatch, with a d15b7 (from a 92-95 dx) has 10 more hp than yours in the 5g civic, but mine is being run on the stock dpfi injection so im gonna assume that 10hp is totally negated. I get 29-31 almost all city, with the ac on at all times. The crx never had ac. So really, I dont know what it gets all highway right now, Ive driven it a few hundred miles on the highway but it was when I got it and didnt know whether the tank was full or not, so I had no way to calculate it. But I guess at least im not buying premium.