![Oak Harbor Freight Lines](https://i0.wp.com/peterbiltfirstclass.com/wp-content/uploads/2017/03/First-Class-spring17-MX-Engine_905x509.jpg?resize=360%2C270&ssl=1)
Peterbilts with MX-11 Engines “Exceeding Expectations”
Since the first installation of a PACCAR MX-11 Engine into a Peterbilt truck earlier this year, the lightweight, fuel-efficient engine has been exceeding the company’s expectations and those of its customers, according to company officials.