I drove to Richmond this weekend and my minumum speed was 70. I had fun several times as well. My avg MPG until I got there was 34 (including a couple of city miles).
So I'm taking my car into the dealership today so they can fix the defect with the key/car turning off. I also asked that they change my oil/filter. It should be done tomorrow night. Let's hope my car isn't a lemon!