This March, Jeep will start selling a diesel-powered version of its Grand Cherokee SUV. The 3.0-liter V-6 common rail turbodiesel engine — called CRD for short — offers 376 pounds-feet of torque, which is more than the optional Hemi V-8 while getting around 50% better gas mileage. The CRD starts at $37,885 before a $695 destination charge.