The 2015 Ford F-150 cab and box fabricated from high-strength, military grade, aluminum alloys Fully boxed frame with eight crossmembers (five through-welded) made of up to 78 percent 70,000-psi high-strength steel (up from 23 percent in the 2014 F-150 frame); up to 60 lbs. lighter with state-of-the-art roll-forming process that minimizes weight Vehicle weight up to 700 pounds lighter than before resulting in better fuel efficiency, greater towing and payload capacities, improved power-to-weight ratio for faster acceleration, enhanced handling and braking responsiveness.