First Chart
Thanks to MetroMPG for the chart. I tested my car in the same location he does. I ran everything twice. It was a nice crisp night around 32f with zero traffic either way. (Maybe one car going the other way)
I noticed my 90km/h run both times was way off. (I might have left it in fourth gear) so tried 90km/h another night and used that data. Originally it spiked up and since then I can't reproduce it. The Scanguage was brand new to me so likely I was distracted.
Scanguage is not calibrated yet. It seems to be pretty close to what the on board analogue fuel consumption gauge is showing. (In the Calibration tank now)