The F-Series is a series o full-size pickup trucks frae Ford Motor Company sauld for ower sax decades. The maist popular variant o the F-Series is the F-150. It wis the best-sellin vehicle in the Unitit States for 24 year an haes been the best-sellin truck for 34 year, Analysts estimate that the F-Series alane maks up hauf o the Ford Motor Company's profits in recent years. In the tent generation o the F-series, the F-250HD an F-350 which wur chyngit tae diesel fuel chyngit body style in 1998 an jynt the Super Duty series.