Greetings, thanks to everyone for the great tips and info all in one place. I got my wife a 2013 FFH in January, and it averaged 41.3 mpg here in LA (with maybe two or three long road trips). She had to take it to the dealer twice for the software upgrade--first time, I don't believe the dealer did it right, or maybe they didn't do it at all. This second visit for software has definitely made a difference; we've only reset the lifetime mileage a week ago but are getting around 45.0, with it bouncing up or down about 1 mpg. Managed to get it to 46.0 tonight coming south over the Sepulveda Pass. We were super happy with the car before at 41, I don't know what to call it with an instant 10% improvement in fuel economy! Update to 28 Sep post (25 Oct today): The wife drives the 405 every day, about 40 miles round trip, so a month after the software update it looks like the car is running around 42.8 with 10000 miles on the odometer. She is not a leadfoot and also does not use hypermiling techniques, she runs the A/C whenever she feels like it (which is most of the time, often to help keep the windows from fogging), and she only puts 87 octane in the tank. Speaking of which, I don't recall any thread making any issue for or against higher octane gas. We love the car because where else would you get this kind of quality and luxury in a beautiful car, paired with 40+ mpg? The only thing that irks me is that we've collected numerous dents in the doors already.
