The newest addition to BMW lineup, the X6 is referred to as a sport activity coupe. From its instantly recognizable BMW front end to the sloped, coupe-like roofline, the X6 is one of the most unique vehicles on the market. Backing up its sporty looks, the X6 offers two engine choices and BMW xDrive all-wheel drive system. During the first four years of ownership, BMW X6 drivers receive a 50,000-mile warranty and $0 maintenance program in addition to an unlimited mileage roadside assistance. The BMW X6 gets an estimated 18-20 mpg on the highway.