The 2011 Buick Lucerne is available as a 4-door, 5-seat sedan. Starting at $29,730, the 2011 Buick Lucerne CX is powered by a 3.9L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 27-mpg on the highway. The top of the line 2011 Buick Lucerne Super, priced at $44,460, 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 23-mpg on the highway.