well today i plugged it in just to try it out, set the gauges to mpg, average mpg, rpms and mph. I definitely know it isn't reading the mpg right, said i averaged 22.5 on a 30 minute highway drive tonight (i drive a 2004 civic lx 5 speed and generally average 38-42 a tank based on my fill up/miles driven calculation). Hoping to read up on it and get it calibrated and such tomorrow.