For Sale: 2020 Kenworth T680 – Ready to Hit the Road! Looking for a reliable, fuel-efficient, and driver-comfort-focused semi truck? This 2020 Kenworth T680 checks all the boxes. Built for performance and long-haul durability, it’s equipped with a powerful Cummins X15 engine and a smooth-shifting Endurant automatic transmission—delivering the perfect blend of strength and efficiency. With only 703K miles, this T680 is just getting started. Key Features: Year: 2020 Model: Kenworth T680 Engine: Cummins X15 Transmission: Endurant Automatic Mileage: 703,372 miles