SuperTruck semi achieves 54-percent increase in fuel economy

Cummins and Peterbilt have created a new demonstration tractor trailer that boasts a 54-percent increase in fuel economy over current trucks. This particular Class 8 Peterbilt 587 uses a high-efficiency Cummins ISX15 engine and managed to average 9.9 miles per gallon over 11 runs over the 312-mile route between Fort Worth and Vernon, TX with a gross combined weight of 65,000 pounds. For comparison's sake, most modern trucks manage between 5.5 and 6.5 mpg. For most long-haul truck drivers, an increase in fuel economy of 54 percent would equate to a savings of around $25,000 per year at current diesel prices.

Autoblog , SuperTruck semi achieves 54-percent increase in fuel economy, SuperTruck semi achieves 54-percent increase in fuel economy