Update : Warmer morning (-8°C). Plugged the EBH for ~3 hours. c°WT showed 31°C. Didn't had to use lights or defrost. SG reported 5.5 LHK AVG.
On the returning trip, I quit only ~1 hour after arriving, so c°WT showed 36°C when starting! SG reported 5.0 LHK after the highway, and it increased to 5.1. I stopped at the gas station to fillup. Results : best tank so far! But bad news is... ScanGauge lied to me
. Every trip I logged is wrong. SG showed 5.44 LHK AVG for this tank. But reality is 6.39 LHK... which is under my 40 MPG goal. I calculated that 43.21 MPG is 17.4% higher than the 36.81 I got. I started to calibrate my SG. Calibration will be finished next tank.
I will delete my logs because the numbers are not real. Also note that every AVG LHK I've posted so far are not real, but I'll still report them because they still show if I did well or not, in comparison to the fake AVG.