How to Find the Most Fuel Efficient Semi-Truck

Freightliner Trucks
On-Highway Trucks
Brown Freightliner on Bridge

When Washington instructed the Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA) to develop new standards focused on fuel-efficiency and greenhouse gas reduction by March 31, 2016, pressure was put on commercial truck dealerships to provide the most fuel-efficient semi-truck possible. These new fuel requirements for commercial trucks will lower costs at the pump and reduce the need for foreign oil. However, meeting these requirements is easier said than done.

The first phase of fuel-efficiency requirements for medium and heavy duty trucks stated that these trucks must lessen their fuel consumption between 10 and 20 percent, depending on the size of the truck. On-highway trucks were required to reduce their fuel consumption by 20 percent, while medium duty trucks were required to reduce their fuel consumption by 10 percent. These regulations will affect 2014 to 2018 commercial truck models (Source: Daily Tech).

GHG14 is the government’s (EPA/NHTSA/CARB/ARB) newest emissions regulation; new regulations begin with model year 2014 vehicles and increases in stringency through model year

2018. The goal of GHG14 is to address global climate change and reduce oil consumption.  Individual certification is required for the chassis, engine, and A/C system and separate standards have been issues for CO2, N2O, CH4 and HFC’s.  Truck manufacturers such as Freightliner already certified its 2013 vehicle fleet one year early – leading the industry.

So how are truck manufacturers meeting the challenge of developing the most fuel-efficient semi-truck? The two more important factors are aerodynamics and tire rolling resistance. To improve fuel economy, truck manufacturers may incorporate fairings that are designed to conceal the leading edge of the trailer and side skirts that block wind turbulence under the trailer. Another method that might be used to develop the most fuel-efficient semi-truck is to include round caps on top of the rear trailer doors. Additionally, the recently developed “super single” wide tires that can take the place of dual tires have shown a 7 percent increase in fuel mileage.*

Up and coming engine technologies focused on fuel economy would also help manufacturers in their quest to produce the most fuel-efficient semi-truck. These new engines will note the speed at which the engine is most efficient based, and then take into account the load and road conditions. The engine will automatically maintain that speed that allows the truck to reach its peak efficiency (Source: Popular Mechanics).

While the mission to create the most fuel-efficient semi-truck is not an easy one, innovations are underway to achieve this goal.  Freightliner’s newest on-highway product the Cascadia Evolution is leading the industry with their impressive mpg as Henry Albert demonstrates.  Henry is able to achieve mpg ranges on a consistent basis reaching 10+ mpg (running a full load) and making it a reality. The Cascadia Evolution has fuel efficient features such as bumper closure, windshield improvements, elliptical shaped mirrors, hood-to-bumper fill, 20 inch side extenders, and more.  To learn more about Freightliner’s fuel-efficient semi-trucks, contact us.