The Peterbilt 579 featured in the video up top is powered by the Cummins X15N natural gas engine. It's the engine maker's latest and greatest natural gas engine and just one of three engines in the ...
MATS, LOUISVILLE -- Peterbilt Motors has added optional natural gas power to its two newest vehicles, the on-highway Model 579 and the vocational Model 567. Both vehicles will be available with the ...