Introducing the heavy-duty truck all others will be judged by. Operators of the new International® LT® Series equipped with the revolutionary International® S13 Integrated Powertrain may see up to a 15%* gain in fuel economy over the first-generation International® A26. This is one reason why we consider this truck/powertrain combination to be the most business-friendly, profit-expanding, driver-supporting, uptime-boosting Class 8 truck to ever roll down the highway.