Paccar is bringing power, torque, and fuel efficiency enhancements to its MX-13 and MX-11 engines for North America. The new engines will be available in Kenworth and Peterbilt trucks in January 2017.
The MX-13 engine output increased to 510 horsepower and 1,850 lb.-ft. of torque; the MX-11 to 430 horsepower and 1,650 lb.-ft. of torque. The enhanced PACCAR MX-11 engine also adds a new 335 horsepower and 1,150 lb.-ft. torque rating in the lower end of the power range.
The 2017 MX-13 and MX-11 engines include a new single cylinder air compressor, variable displacement oil pump, and variable speed coolant pump providing customers with fuel economy gains over the previous engine design. The latest MX-13 and MX-11 engines extend oil and fuel filter change intervals from 60,000 miles to 75,000 miles. PACCAR MX-13 and MX-11 engines now utilize a single canister aftertreatment system that reduces weight by 100 pounds, improves serviceability, and lengthens service intervals.