| | Rear-wheel and four-wheel-drive configurations are available, as are both Crew Cab and King (extended) Cab body styles. Both cabs can comfortably seat six, but the interior of the Crew Cab model is nearly as roomy as a full-sized SUV and has miles of leg room. Optional cabin features include leather upholstery, rear DVD entertainment system, premium Rockford Fosgate audio system, hands-free Bluetooth cell-phone interface, XM satellite radio and a navigation system. The two-wheel drive Titan delivers a solid 18 mpg on the highway and 13 mpg in the city while the four-wheel drive averages 13/17 mpg. Nissan is again offering a flex-fuel version of the Nissan Titan for no extra cost, giving drivers the option to run their truck on either straight gasoline or E85 ethanol - a blend of 15 percent gasoline and 85 percent alcohol. While not available at all service stations, E85 alcohol is generally less expensive per gallon than gasoline. |  |