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With a slightly modified 73 system I consistantly get 27-28 in the highway with the cruise control on, 28-9 with it off cruising at 72MPH. Around town 22-23, less in the cold weather of course. If your getting 30 or over on the highway and cruise above 65 thats too lean a setup and you may burn a piston. I got my FI system up to 35MPG once by accident when I was tuning it on a trip. Good thing it wasn't too hot out at the time! Keith