Changes to the engine are focused around efficiency, robustness and thermal management. May 27, 2021 Detroit The Detroit DD13 engine is now available with new features and power ratings, making the 13L a powerful choice for any highway or job site. Changes to the engine are focused around efficiency, robustness and thermal management, all of which contribute to a low total cost of ownership (TCO) and maximum uptime. "The DD13 Gen 5 was built on the proven Heavy-Duty Engine Platform from Detroit on which our customers depend to deliver unmatched efficiency and power," says David Carson, senior vice president, sales and marketing for Daimler Trucks North America. "The DD13 Gen 5 builds on that legacy, while offering even more flexibility and options for specific application needs."