The 2010 Mazda CX-9 is available as a 4-door, 7-seat sport utility. Starting at $28,805, the 2010 Mazda CX-9 Sport FWD is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2010MazdaCX-9Grand Touring AWD , priced at $ 34,215 , is powered by a 3.7L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 21-mpg on the highway.