Sentences with phrase «mandated fuel economy gains»

To help their makers meet mandated fuel economy gains, the Ram 1500 gets a standard 48 - volt system for its V - 6, optional in the Hemi, and loses about 275 pounds, while the new Chevy Silverado gets a new diesel and a rumored 2.7 - liter twin - turbo I - 4, and loses 450 pounds thanks to its mixed - material construction.