Same here as DJTECH: 13.2 when the light comes on. My car has 4:10s and the Magnaflow catted X-pipe. I get 24 @ a steady 75mph, and 17-18 in my daily city/hwy driving. If I minimize shifting and throttle (drive like grandma) -- 2d-gear starts and skip gears periodically, I can just touch 20.