Let's discuss something that is well known by diesel mechanics and hard-core enthusiasts but may not be fully understood by new diesel owners or people who may have heard the term "compression ...

Want to know how healthy or unhealthy your engine really is? Get yourself a compression tester and find out. Despite how complex many modern vehicles are, you can do many common repair and maintenance ...

As Mazda and Infiniti have proved, there's a lot of innovation left in the internal-combustion engine. One of the more wild concepts we've seen is called Reactivity Controlled Compression Ignition ...

A gasoline piston engine that can dynamically change its compression ratio —that is, the amount by which the piston squeezes the fuel-air mixture in the cylinder—has long been a holy grail of engine ...

Heavy-duty pickups and long-haul trucks rely on torquey diesel engines that are more economical, reliable, durable, and have a more straightforward construction than a comparable unleaded gas engine.

A fundamental difference between gasoline and diesel engines is that a gasoline engine uses spark ignition while a diesel engine uses compression ignition. Before we delve deeper, let's understand how ...

Military vehicles such as Humvees are often seen wading through water without much trouble, which gives diesel engines a reputation for being nearly indestructible. While they are tough and generally ...

Have you always wondered what separates a diesel-powered car from a gasoline-powered one? For starters, you’ll never need to change a diesel engine’s spark plugs or a gasoline engine’s glow plugs.

Black exhaust smoke, tractor-like engine noises, and sluggish performance: all things that were associated with diesel engines. And I say “were” because they’re mostly a thing of the past. Modern ...