Today's "downsped" drivetrains can improve fuel economy, but high torque and low axle ratios can create all sorts of havoc with drivetrain components.

As truck makers and fleet managers face increasing pressure to lower their carbon footprint, one step fleets can take to help with decarbonization efforts...

Displacement on demand, also known as cylinder deactivation technology, is likely to be a critical component for meeting the EPA’s next round of stringent...

With almost one-third lower fuel consumption. Volvo Trucks’ new concept vehicle shows how it is possible to drastically boost productivity in long-haul...

By the early ’80s some fleets were using roof-mounted air fairings on their road tractors to reduce drag. That got the attention of owner-operator Bob...

UPS has 90,000 trucks, tractors and package cars around the world is known for its push to adopt alternative fuels and powertrains, which run “green miles.”...

On top of the pandemic, supply chain shortage, and the distant danger of long-term inflation, the war in Ukraine has helped drive fuel prices skyward. Will...

DIY fuel economy testing may not provide reliable data, or gains for certain products may be too small to see.

It's Isuzu's biggest truck in North America. But does that mean it's a departure from the OEM's tried-and-true design philosophy? HDT's Senior Editor, Jack...

Improving trailer aerodynamics for heavy-duty trucking fleets is an easy and sure-fire way to reduce fuel consumption. Not only are you reducing your carbon...

There's a new head of the committee developing the new heavy-duty engine oil classification, known as PC-11. HDT talked to Shawn Whitacre to find out what...

Tires contribute approximately 25-35% of a truck’s total rolling resistance. The less rolling resistance, the less energy it takes to move the truck. And a...

The problem with the proposed Phase 2 GHG regulations is that Washington never sees the whole picture with the trucking industry.

Encouraging drivers to drive more efficiently through coaching tools and reviews will get fleets further than limiting or taking away performance features.

10 mpg is more of a line in the sand than the barrier it was once thought to be. Can 11 mpg be far off?

Hyliion’s hybrid-electric system makes the truck feel like you have only half a load in the box, says Equipment Editor Jim Park.

These common-sense tips can be implemented across many different types of fleets — and most don't require a substantial financial outlay.

If you want to test drive some new tires before you buy — and who wouldn’t — be prepared to invest significant time and energy in the project.

When you're spec'ing a powertrain for a new truck, the process isn’t finished even after all the calculations are done and the appropriate ratios sorted...

Vnomics’ True Fuel is a monitoring device that encourages drivers to do better without getting on their nerves or taking away drivability, while providing...