The display was right at 30.3 (both of them). Having said that though, there are a couple of things to take into account.

I filled up at the same Shell station that I get 80% of my gas from. However, I did not have my "usual" pump. The pump I went to allowed me to put much more fuel in the car than I ever have before. In fact, I caught it just before it ran out of the pipe.

On the return trip from Detroit to Cincy, I was running 72 miles per hour with a 40 MPH (gusts higher) side wind. I had the wheel 10 - 20 degrees turned right just to stay on the road! The mileage of the tank is not what concerns me.

What concerns me is putting 17.8 gallons in. I would have expected if the car were bone dry to be able to do the 17.2 in the tank and another 0.3 - 0.4 in the filler pipe. Because of condensation and sediment, the pickup is not on the exact bottom of the tank and the car was running when I got there, so there had to be at least 0.2 - 0.3 in the tank.

The filler pipe must be huge!

THOSE OF YOU IN COLD CLIMATES.... please chime in on this: How is your mileage when the temp is under 40F and you are going over 60 miles per hour?