Use ABRP, and run the efficiency calibration, to get the least biased result possible. With the model, temp, tire and pressure, we have some basis for comparison. This is what I get for the Quatrac5, 247Wh/mile at 41F and 39psi. In warm temps I get as low as 235Wh/mile.Driving speed is around 60-70 highway in 50-70f weather. Prior to getting these tires my wh/mi was around 220-250.