The LT Series with the S13 Integrated Powertrain.

Leading the on-highway aero category by at least 5% in fuel economy.*

*The International® LT® with S13® Integrated Powertrain was tested head-to-head using TMC Type IV testing methodology against competitive on-highway aero models with comparable specifications: Freightliner Cascadia AeroX DD15, Kenworth T680 MX13, Volvo VNL760 D13. Testing proved the International LT with S13 Integrated Powertrain to be at least 5% more fuel efficient than these models. The International LT with S13 Integrated Powertrain uses up to 3.5% more DEF per gallon of fuel compared to comparable on-highway aerodynamic models.

LT Series with the S13

Leading the on-highway aero category by at least 5% in fuel economy.*

*The International® LT® with S13® Integrated Powertrain was tested head-to-head using TMC Type IV testing methodology against competitive on-highway aero models with comparable specifications: Freightliner Cascadia AeroX DD15, Kenworth T680 MX13, Volvo VNL760 D13. Testing proved the International LT with S13 Integrated Powertrain to be at least 5% more fuel efficient than these models. The International LT with S13 Integrated Powertrain uses up to 3.5% more DEF per gallon of fuel compared to comparable on-highway aerodynamic models.

5% Fuel Economy Guarantee

GUARANTEED AT LEAST 5% MORE FUEL EFFICIENCY OR A $2,500 PARTS CREDIT CARD

If your International® LT® Series with the S13® Integrated Powertrain doesn’t realize at least 5%* fuel economy savings over a 12-month period, we’ll make it right with a $2,500 parts card credit per unit. Offer conditions listed below:

  • Advantage card application must be submitted by your dealer 18 months after DTU date.
  • Fuel economy needs to be equivalent spec to spec MY25 or prior class 8 chassis.
  • Both units must be in service for a 12-month period.
  • Parts and Service International Advantage® card issued in the amount of $2,500 will be valid for 12 months from issue date.

Setting the standard in the on-highway aero category

We went to great lengths to maximize efficiency in the International® LT® Series, making it the most fuel-efficient highway tractor. With enhanced aerodynamics and a clean-sheet design, the S13® is engineered to deliver unmatched performance for our customers.

The Future of Powertrain Engineering

Engineered in-house, the International® S13® Integrated Powertrain represents a groundbreaking achievement in design and innovation. Every detail, from the aftertreatment system and advanced T14 Transmission to the powertrain’s core components, has been reimagined.

With lower fuel pressures and a variable oil level system, parasitic losses are minimized, and efficiency is improved. The S13 Integrated is a testament to the expertise and ingenuity of our engineering team. It is more than just a powertrain—it’s a smarter, more fuel-efficient solution for drivers.