The 2008 Infiniti FX35 is available as a 4-door, 5-seat sport utility. Starting at $38,050, the 2008 Infiniti FX35 4x2 is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway. The top of the line 2008InfinitiFX35AWD , priced at $ 39,550 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.