I have an LS, and it's gears are slightly longer, but I have come up with an urban driving shift map that should translate fairly well for you.

In the suburban slog of Southern Marin, where there are a fair number of medium grade slopes, I use 3rd at about 35mph or so, where there are hills or other factors that necessitate the ability to accelerate quckly without having to downshift. If the traffic is thick and at about 38 mph or more, I shift to 4th.

In 3rd at 35mph, tach ±3900rpm. In fourth at the same speed, the tach reads about 2200rpm. The engine doesn't lug and if the need to accelerate arises, just downshift to 3rd and get on it. :thumbup:

All in all, this has netted an additional 4 to 5 mpg minimum, for an overall average of about 26.71 mpg. Not bad.

I have found, however, that keeping your tires properly inflated has an even greater effect on mileage. I run 30psi F / 31psi R [cold] on 205/45 R16 tires.