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
The Ford F-Series is a series of light- trucks and medium-duty trucks (Class 2-7) that have been marketed and manufactured by Ford Motor Company since 1948. While most variants of the F-Series trucks are full-size pickup trucks, the F-Series also includes chassis cab trucks and commercial vehicles. The Ford F-Series has been the best-selling vehicle in the United States since 1981 and the best-selling pickup since 1977 It is also the best selling vehicle in Canada.
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.