You state "40-50 mpg" for the HB. Just curious - a misprint? I have a 92 Civic Si HB, and on the best of days, keeping RPMs low (shifting ASAP), keeping under 65, I can squeeze 30 out of her. Maybe 31 at 55. That's with 74K miles, recently tuned, kickin' back and enjoying the ride. What have you...