Kenworth Manufacturer of The World’s Best® heavy and medium duty trucks for over 90 years.Designed to Get the Job Done: In the real world, few things work as well – as reliably, as efficiently, as productively – as a Kenworth truck. Kenworth W990 For professional drivers, the W990 represents the ultimate reward, a uniquely personal icon that stands for their dedication, achievement and sense of pride. Kenworth T680 Advantage A sleeker profile is just the beginning. The ultra-aerodynamic T680 Advantage with the PACCAR Powertrain from Kenworth squeezes every possible mile from a gallon of fuel.