F-250 and F-350 became the Ford vehicles; considered an expansion of the F-Series, the trucks are built on a chassis with heavier- components. As of the 2017 model year, the F-Series includes the F-150, the Super (F-250 through F-550), and F-650 and F-750 Super medium-duty commercial trucks. The most popular version of the F-Series is the F-150
To further increase fuel economy, a 3.5L V6 became the base engine with the introduction of a 2.7L EcoBoost twin-turbo V6 alongside the 3.5L version; the 5.0L V8 remained available. The F-150 is the first pickup truck with adaptive cruise control, which uses radar sensors on the front of the vehicle to maintain a set following distance between it and the vehicle ahead of it, decreasing speed if necessary.