Okay I filled up Monday morning, I've driven 104 miles in commute traffic, my needle is still pegged to full, hasn't moved yet...I likey.

 

Just for grins, sometime right after you fill up, divide your DTE by the fuel mileage showing on your overhead. The result is the number of gallons your computer uses for DTE calculations. I always seem to get 30.8.

 

32.5? IIRC? I'll try it next time to be exact though.