Did coastdown testing today, since the weather was nice and the winds unusually light. Using
this method, I did 6 runs (3 north, 3 south) on a flat stretch of road, measured the mirrors I took off the car to get an accurate frontal area, adjusted rho for altitude, temperature, and pressure, estimated the weight (curb weight+me+150 lbs of sound deadening--it might be lighter in actuality since the tank is almost empty) and plugged it all into the spreadsheet. Looks like around Cd .212 and Crr .010.