Hey shorty boy, you should get some low rolling resistance tires and see how that helps your mileage. I picked up a set of honda insight wheels I plan to use on my project. Eventually it will get done...
Got some vi-rs seat covers in last week. They look much better in person than in pictures. I asked a guy in asia who was auctioning the seats if he could remove the covers to save me on shipping and he did, and he took less than asking price.
If anyone knows someone that needs b13 sentra se-r stuff I'm parting one. I have hood, doors, fenders, trunk lid with spoiler, gauge cluster, sr20de ecu, and low mileage japanese sr20 motor, se-r rims, sunroof glass, everything is painted this strange grey(not primer) but in really good shape. Also have the rear glass triangles, power mirrors, brakes I installed brand new calipers, pads with 250 miles on them. Thought I had the rear window until it shattered everywhere (DOH!) We've been having the car sitting for awhile and just too many cars so I started taking it apart. Just a shell now.
Sorry to hear about the IAVC problem... sounds like its time to sort that out. Lean burn makes a huge difference in the insight so I'm sure its the same case with the z7. I guess what it really seems to do is help average your stop and go up to your non lean burn cruise mpg. For instance the insight can do 100mpg in lean burn but that really only helps to bring up overall mileage to the non lean burn cruise mileage which is somewhere around 70mpg. Have you taken any road trips? I recently made a 4 hour drive @ 84mpg in the insight. Over 140 miles @ 95mpg.