U.S. Canada Menu Inland / News & Resources / 2021 PACCAR MX Engines Unveiled 2021 PACCAR MX Engines Unveiled May 10, 2021 2021 PACCAR MX-13 Engine With the launch of Kenworth’s new T680 Next Generation truck model, also comes the 2021 PACCAR MX-11 and PACCAR MX-13 engines, giving even better performance and efficiency to Kenworth’s Class 8 truck lineup. Both engines feature re-designed internal components to enhance fuel economy – up to 2.4 percent* in the PACCAR MX-13, and 3.4 percent* in the PACCAR MX-11 – depending on the application and specification. The PACCAR MX-11 can now be spec’d with a higher horsepower rating of up to 445 hp at 1,700 lb.-ft. of torque @ 900 RPM. The PACCAR MX-13 can be spec’d up to 510 hp at 1,850 lb.-ft. of torque @ 1,000 RPM. These new engine developments make Kenworth trucks more productive. When paired with the 12-speed PACCAR TX-12 transmission, Kenworth predictive cruise control, and PACCAR DX-40 axles, the performance is enhanced even further. Helping drive fuel efficiency improvements is a number of refinements that all come together to maximize performance. The engines feature optimized combustion with multi-pulse fuel injection. A smaller, more efficient turbocharger boosts power and improves responsiveness. And an enhanced piston design has added features to reduce frictional losses. PACCAR’s next generation aftertreatment system completes the system to further reduce particulates and NOx without sacrificing power or MPGs. 2021 PACCAR MX-11 Engine The engines were updated for added reliability. An enhanced fully-encapsulated engine harness protects against the elements, while connections were reduced between the engine and vehicle. Inside the engine, several structural enhancements were added to strengthen components and optimize rigidity. To make fuel filter changes more efficient, PACCAR now mounts primary and secondary fuel filters on the engine, instead of on the chassis. And, a 12-volt fuel heater comes standard for improved cold weather performance. Extended service intervals of up to 75,000 miles for both the oil and fuel filter combined with major components warranty, which is 5 years or 500,000 miles, results in best-in-class performance and service intervals. Kenworth is The Driver’s Truck™. See what drivers are saying at www.kenworth.com/drivers. Kenworth Truck Company is the manufacturer of The World’s Best® heavy and medium duty trucks. Kenworth’s Internet home page is at www.kenworth.com. Kenworth is a PACCAR company. Tags PACCAR MX-11, PACCAR MX-13 Post navigation Kenworth Launches New Medium Duty Product Lineup Kenworth Adds Hendrickson HAULMAAX EX Suspension for Class 8 Models You may also like PACCAR Introduces Enhancements To MX-13 and MX-11 Engines Kenworth Launches New Technology To Improve Vehicle Diagnostics and Productivity PACCAR MX-11 Engine Offers More Productivity for Vocational Customers Kenworth Offers $1,000 Savings to OOIDA Members on Qualifying New T680, T880 and W990 Sleeper Truck Purchases Zero-Emission Kenworth T680 Equipped with Hydrogen Fuel Cell on Display at Consumer Electronics Show Inland is the dynamic leader in a competitive heavy-duty truck and equipment marketplace. For 70 years, our customers have relied on us for all their product and service needs. Careers News & Resources Financing About Inland Canada Brandon Burnaby Corporate Campbell River Castlegar Cranbrook Dawson Creek Delta Estevan Fort St. John Kamloops Kelowna Langley Nanaimo Penticton Prince George Quesnel Regina Saskatoon Swift Current Terrace Vernon Whitehorse Williams Lake Winnipeg U.S. Albuquerque Carson El Centro Farmington Fontana Los Angeles Mesa Otay Mesa Phoenix San Diego Tucson 2021 © Inland Kenworth • Privacy Policy Locations Inventory Kenworth Trucks Parts Service Lease & Rental Financing News & Resources Careers