How accurate is the Scangauge compared with the cars computer as regards to fuel economy?
ScanGauge is supposed to be pretty accurate, once properly calibrated. At the moment I believe mine to be under-reading, but once I make my second and subsequent fill-ups, which allow the ScanGauge to calibrate its calculation of what petrol it thinks I have used, to the actual amount added to the tank, it will be much more accurate. Of course, the only really accurate determination is the measured figures from a number of actual fill-ups. Main purpose of the ScanGauge is to show me the trend of the instantaneous consumption reading, and even that is a second or so behind the event.
2006 Honda Jazz 1.2i-DSi S Vivid Blue Pearl