The 2013 Cadillac XTS is available as a 4-door, 5-seat sedan. Starting at $44,075, the 2013 Cadillac XTS Base FWD Sedan is powered by a 3.6L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 28-mpg on the highway. The top of the line 2013 Cadillac XTS B05 Armored FWD Professional, priced at $49,575, is powered by a 3.6L, 6-cylinder engine that returns an EPA estimated 15-mpg in the city and 21-mpg on the highway.