I've had an 07 for 2 years and currently have an 09 for several months. I can average 39-41 regularly back and forth to work which is very little city (15%) and the rest is urban. My wife averages 33-35 with the same type driving. Don't know how I could get 50. I have not paid attention to the ethanol blend on the fuel I buy but think most are. Will have to look and see if I can find some with 100% gasoline and see If there is a difference. I do run 38-40lbs of pressure in my tires.
I live in the Alabama and we don't have winter blends or some of the other additives for pollution so we don't see hardly any drop in the winter.
Bob
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2009 Tacoma PreRunner Crew Cab. Wife's Car
2009 Camry Hybrid, Mine :
2008 Harley Davidson Screaming Eagle Road King-My Bike
2005 Harley Davidson Deluxe-Wife's Bike
1998 Honda Accord EX (Daughters, but I bought it)
2009 Corolla LE (Other daughter but she's paying for most of it)
Photos located at
http://community.webshots.com/user/currybob