Ok, i'm confused after reading several posts.
I have ScanGauge II and i want to know:
1) Is my MPG actually calculated correctly or is it some standard # the ECU is reporting? Meaning, we all know if we haul stuff, our MPG goes down, so does the ScanGauge actually report our correct MPG.
Example: If i don't haul, i get about 320miles on a full tank. If i haul, i get about 240miles per tank.
2) I noticed my speedometer is off? Or is it my ScanGauge that's off? When i'm traveling about 75mph, it says on my SG, that i'm traveling 79mph. The faster i travel, the more range there is between my unit and actual speed.
Example: 60mph (speedo) = 63mph (Scangague).. 70mph (speedo) = 75mph (scangauge). 80mph (speedo) = 89mph (scangauge).
I don't know which to believe.