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

A semi truck diesel engine's exhaust isn't just noisy ... The rules also prohibit exhaust from venting directly beneath or in front of the driver's compartment, or in areas where it could ...

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 ...

Their trailers—known as tractor-trailers—have no front ... truck is connected, and pressure from the truck’s engine-powered air pump releases the brakes, can the trailer roll. Thus: “semi ...

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 ...

“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.