 My new 2010 Sienna LE FWD is getting a disappointing 14 mpg's city, and 19 mpg's highway. The on-board computer displays an average of 16.4 mpg's for the 1,600 miles I've driven it. This is far short of the 17/27 and average 19 mpg's advertised.  The vehicle has an extremely wide feel to it which is threatening when you are on narrow city side streets with on- coming traffic. The turning radius is wide. Turning into a narrow parking lot space is a challenge. It's hard to pull into a space evenly straight,  The Van is usually angled and you have to jockey it back and forth to straighten it out. This is not an agile vehicle for tight city driving. It's a very smooth quit ride on the open road.