I found out that the gas mileage on the 2011 Mazda Cx9 Front wheel drive model is rated at 17 City and 24 Highway. The numbers are slightly higher than 16 city and 22 highway for the 2010 Mazda cx9 Front wheel drive model. I wonder if the Mazda dealership is able to update the engine software on 2010 CX9 to increase the gas mileage to 2011 specs. Does anyone has any answer?