I have a 93 Special w/ 132,XXX mi. on it and I get 27 mi/gal in the winter b/c of the change in formulation of the winter gas.:madfawk: During the spring and summer I get 30-33 mi/gal. The most I've ever done to the tank was 403! That's w/ I/H/E on my stock 14's, but w/ 15's it mess up the calibration, so I don't know what I get w/ the 15's accurately.:dunno: