I hit a new high water mark for fuel economy in my 06 Sonata with the L4/5 speed manual. My wife and I took a short weekend trip through the finger lakes area of upstate NY and got just over 32 MPG, which brings my average since new up to just shy of 29. This trip was mostly rural two-lane roads traveling at 50 MPH or so as we weren't in any hurry. We did run the four-lane home from Geneseo back to Corning at 65 MPH though.
I'm anxious now to get on a real road trip to see what it will do. I'll be taking my daughter to college next weekend for freshman orientation and that will consist of about 160 miles of two lane (routes 6 and 66) and then another 40 or so of I-80. I've taken the trip using 15 and then I-80 for the bulk of the way, but it actually takes 30 minutes longer that way than the short-cut out 6/66 and droning along I-80 makes it SEEM like it takes hours longer!
Matt