Well, I had to make a business trip from ELM to Boston last week and I needed to drive up and fly back so I got a one-way rental from Avis. Guess what kind of rental car I got? Yep, a Sonata! I don't know what model it was, but it had the V-6 and automatic. It had a trip computer and automatic headlight setting, but otherwise seemed very similar to my GL. It was a decent car for the trip and the computer got up to 31 MPG by the time I reached Boston and this was running right at 70 MPH most of the way (I actually averaged 66 MPH according to the computer). I didn't check the mileage manually as I have no way of knowing how full the car was when I got it, but I don't think it got 31 MPG as the tank dropped noticeably faster than my 4 cylinder Sonata and its best ever mileage was 32. I'm guessing I got 28-29 based on the rate at which the tank was dropping as that is what I am getting currently with my Sonata commuting to work.
The trip computer was fun to play with, but lacked an instantaneous MPG readout. I find those very entertaining when driving in hilly country, drafting semis, etc. I'm surprised that Hyundai didn't include that. Does the top-o-the-line model have an instantaneous MPG readout?
Matt