[aerohead]

Originally Posted by Xist

I guess that I did not drive the car enough to warm up, but I did the A- route, almost twenty-two miles, went to fill up, and it clicked after 0.147 gallons, so I decided to do two clicks each time, and it stopped at 0.174 gallons, and I almost had gasoline spilling down the side of my car.

Okay, sure. 150 MPG. Somehow, I think that driving with the air dam would show worse results, and my second A-run might be worse still.

For how long do you need to drive your car before it is warm? It is over a hundred degrees for most of the day; how cold is that?

According to published SAE research,an automobile requires 22-miles of driving at 50 mph to bring all components/fluids up to equilibrium temperature.If road testing is attempted before achieving this equilibrium temp,you'll never be able to sort out what did what from your results.