[MetroMPG]

Well, you know what? This "problem" could be an opportunity to do a test.

And the test could be: how far/long do I have to drive the car to get the drivetrain to a stable temp (car coming to a stop at the same point on say 3 successive runs).

Then I could go on to do an actual test on a warm drivetrain, and not consider the warmup to be a total waste.

Or I could just go to my original tried & true test route. (It's far enough away that the car is warm when I arrive).

PS - the difference in the 4 runs today was pretty big: the shortest was about 45 feet less than the longest.