International ProStar.
The International ProStar is class 8 commercial vehicle manufactured by Navistar at its Chatham, Ontario, Canada plant. International touts the ProStar as the most fuel efficient truck in the Class 8 segment (after-International Harvester Auto Wagon, International F-Truck, International Model S, International Six Speed, International Harvester A-8, International Harvester B-8, International Harvester C-50, International CS-50 Truck, International Harvester D-Series, International Harvester W-4, International LDF-405, International RDF-405, International DF-405, International DF-400 Series, International 9000 Series (1971-1985), International 9000 Series (1985-1999), and International 9000 (2000-2017)).
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