Peterbilt shows off more aerodynamic Model 579

Updated Feb 16, 2021

Peterbilt this week unveiled an updated version of its flagship Model 579, which now stands as the company’s most aerodynamic and fuel-efficient truck ever produced. During a presentation streamed live on YouTube, it was announced the new 579 has improved its fuel economy by 7%. It’s powered by 2021 Paccar MX-13 and MX-11 engines paired with the Paccar transmission.