The Ford F-Series is a series of full-size pickup trucks from Ford which has been sold continuously since 1948. The most popular variant of the F-Series is the F-150. It has been the best-selling vehicle in the United States for the past 32 years, and the best-selling pickup for 43 years, and the best selling vehicle in Canada. In the tenth generation of the F-series, the F-250 and F-350 changed body style in 1998 and joined the Super Duty series.