These hulking diesel engines power the economy with massive torque, hundreds of horsepower, and hard-driving reliability.

Some semi-trucks have two giant silver cylinders on their sides, but others don't. Here's why that is, and what exactly those ...

If you’ve ever driven on a highway, chances are you’ve seen a semi-truck rumbling along. These large vehicles might seem like just another part of the road, ...

PepsiCo says it has converted engines in 20 semi trucks traveling Iowa so it can use 99% biodiesel and cut carbon emissions.

Up front is the regular diesel tractor. Just behind it ... your mileage is definitely going to vary.Federal law limits each semi truck to 80,000 pounds gross. The Revoy module, whatever it ...

“When we talk scale, we're talking big scale,” Priestley noted in front of a packed ... For starters, the Tesla Semi is closer to parity with diesel trucks than other electric offerings.

Diesel trucks cost about 17 cents/mile for maintenance. The Tesla Semi will almost certainly cost ... places — but you have to pay it all up front (or get a loan) and the power only comes ...