The 2013 Infiniti IPL G is available as a 2-door, 4-seat coupe. Starting at $51,200, the 2013 Infiniti IPL G (M6) Coupe is powered by a 3.7L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway. The top of the line 2013InfinitiIPL GConvertible , priced at $ 61,450 , is powered by a 3.7L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.