I don't know the mileage, but cruising at ~55 (traffic) for like an hour, my avg was like 31.something I believe.

 

I ended up getting 452 out of my last tank. Im sure I could have lasted longer, but didnt want to risk it.

Of course, I couldn't tell how empty I really was becuase my gas tank was acting up again!! When I kept trying to fill all the way up, it kept stopping at 8 gallons and would not fill up a drop more!

I then got in the car and started it up, and the needle only went between 1/4 and 1/2 a tank.

 

446 miles, almost all highway driving to the Eastern Shore of Va and back. Fill up was 17.5.

 

I went from Lenexa, Kansas to Rogers Arkansas and back got about 480 or so