well, I've got a 32mi Round trip where the posted speed limit doesn't go above 50 mph, and about 15 traffic lights on the 16 mile stretch. I get roughly 10 of the 15 lights, and my Calculated Fuel mileage is around 47.1 MPG. This 32mi round trip is with heavy foot off the stop, and trying to get away from traffic so I can cruise (usually my efforts are moot) but over the 6000 miles i've had my car, I can usually go 575 miles between fill ups, and I don't run my car dry... Now highway, I get somewhere between 42 and 45 mpg...