The 2012 Lexus GX 460 is available as a 4-door, 7-seat sport utility. Starting at $53,245, the 2012 Lexus GX 460 Base is powered by a 4.6L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway. The top of the line 2012 Lexus GX 460 Premium, priced at $58,040, is powered by a 4.6L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.