Several of the world's largest truck makers are switching away from diesel. The replacement comes in two forms, and the race ...

Diesel engines are capable of putting out plenty of power. But if you don't keep up with maintenance, a few issues could make ...

Can stuck piston rings be restored without teardown? A 500,000-mile Valvoline engine test shows how deposit removal may ...

Diesel powertrains have historically been associated with two things: big towing power and increases in fuel economy compared to their gasoline-powered counterparts. Diesel engines usually provide big ...

This particular OM651 diesel engine failed, but the issue does not appear to be related to its complex, overbuilt construction. The Mercedes OM651 diesel engine is robust but has mixed reliability due ...

Diesel engines lack the spark of gas engines, both literally and figuratively. They don't need a spark plug since they ignite the fuel using only compression, but also lack the 'je ne sais quoi' that ...

Daimler Truck executives signaled a renewed focus on diesel powertrains at the company’s Capital Market Day 2025. Senior leaders at the world’s biggest truck maker, including Daimler Truck North ...

Knowing what company manufactures specific parts of your car can be tough, especially if you don't have easy access to the information. When it comes to semi-trucks and other heavy-duty vehicles, ...

Discover the engineering marvel behind Mazda's Skyactiv-D 2.2 diesel engine, and what lies ahead for diesel fuel. Mazda unveiled the second-generation CX-5 in 2016 and promised buyers they would soon ...

With a Master's degree in English Literature and six years of writing experience, Aayush has been contributing to TopSpeed for over two years. Since 95% of his personality is motorcycles, he goes ...