Peterbilt Motors Co. recently held an invitation-only event for 114 customers and dealers at the Texas Motor Speedway racetrack to show off the capabilities of the proprietary Paccar MX-11 and MX-13 engines in a range of truck models. (All photos courtesy of Peterbilt)
Sean Kilcarr is a former longtime FleetOwner senior editor who wrote for the publication from 2000 to 2018. He served as editor-in-chief from 2017 to 2018.