The 2010 Mazda Mazda6 is available as a 4-door, 5-seat sedan. Starting at $26,085, the 2010 Mazda Mazda6 i Grand Touring (A5) is powered by a 2.5L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway. The top of the line 2010 Mazda Mazda6 i Touring (A5), priced at $21,950, is powered by a 2.5L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway.