Sisu M-series – is a 2–4-axle forward control lorry model series made by the Finnish heavy vehicle producer Suomen Autoteollisuus (SAT) in 1969–1984. The series consists of 4×2-driven M-161, 6×2-driven M-162, 6×4-driven M-163 and 8×2-driven M-168. Typical applications were logging trucks, tankers and long-distance transportation haulers which pulled conventional and semi-trailers. The permissible payloads varied from ca. 9 tonnes up over 18 tonnes.