Just curious how you calibrated your Scangauge. Was it just a setting in the box or was it compared to GPS? Only reason I ask is it seems like your speedo is a little more off than most. It appeared to be at 50-51 when your scangauge read 60. I know with GPS my speedo reads 54 at 60. I haven't messed with the scangauge settings but that would be easier than memorizing the % difference and doing the math in my head. Lol. But since mine is 11% I just round down to 10% driving around town so pretty easy.