Detroit recently unveiled its new Gen 6 heavy-duty engine lineup, including the:
with production beginning in January 2027 for the DD13 and DD15, followed by the DD16 in January 2028.
Vehicle emissions regulations did not happen all at once.
They developed over decades as engineers, regulators, and manufacturers responded to air quality problems caused by hydrocarbons, carbon monoxide, nitrogen oxides, particulate matter, and later greenhouse gas emissions.
For diesel engines, the biggest changes came when regulations began focusing more heavily on particulate matter, NOx, fuel sulfur levels, and aftertreatment systems.
Continue reading History of Vehicle Emissions Regulations: From Smog Controls to Modern Diesel StandardsThe diesel industry is entering another major emissions transition.
Beginning with EPA 2027 heavy-duty emissions regulations, diesel engines will face some of the strictest nitrogen oxide () standards ever introduced for commercial vehicles.
One of the biggest technologies helping manufacturers meet these standards is the 48-volt heated aftertreatment system.
This system is designed to:
Modern diesel engines already rely heavily on aftertreatment systems.
However, EPA 2027 standards require emissions systems to become even more effective during:
That is where heated aftertreatment systems become important.
Continue reading What Is a 48-Volt Heated Aftertreatment System?A lot of people are interested in becoming diesel mechanics because they:
However, many people only see one side of the industry. They see:
…but they do not always see the reality of the day-to-day work.
Continue reading What Is Day-to-Day Life Really Like as a Diesel Mechanic?Being a diesel mechanic is not an easy career – but that is also part of what attracts many people to it.
Modern diesel technicians are expected to understand:
At the same time, the work can be physically demanding and fast-paced.
However, for many technicians, the challenge is also what makes the career rewarding.
Continue reading Is It Hard to Be a Diesel Mechanic?Yes: diesel mechanics can absolutely make over $100,000 per year.
However, that level of income usually depends on several factors, including:
Not every diesel technician earns six figures, especially early in their career. However, highly skilled technicians in the right industries can reach or exceed 100K consistently.
Continue reading Can a Diesel Mechanic Make $100K a Year?Class 8 trucks are the largest and heaviest commercial vehicles commonly operated on public roads in the United States.
These trucks are designed for:
When most people think of a semi-truck, tractor-trailer, or 18-wheeler, they are usually thinking about a Class 8 truck.
These vehicles are the backbone of freight transportation across North America and play a major role in industries like:
You’ve probably heard the phrase – America runs on diesel.
And it’s true.
Diesel engines power the trucks that move freight across the country, the equipment that builds infrastructure, and the machines that keep industries operating every day.
But here’s the part that doesn’t get talked about enough:
👉 What happens when those diesel engines don’t perform the way they should?
Because when a diesel engine goes down, it’s not just one machine: it can slow down an entire operation.
Continue reading How Diesel Engines Keep America RunningToday, diesel engines power everything from long-haul trucks and construction equipment to locomotives, generators, agricultural machinery, and ocean-going ships.
But when German engineer Rudolf Diesel began working on his revolutionary engine in the 1890s, none of that existed.
In fact, Diesel wasn’t trying to build a better truck engine.
He was trying to solve a much larger problem: How do you create an engine that wastes less energy?
The answer would eventually become one of the most important mechanical inventions in modern history.
Continue reading The History of the Diesel Engine: How Rudolf Diesel Changed the WorldEvery CDL driver hopes they never need one.
Most passenger vehicle drivers have seen them but never really thought about them.
And when one is used, it usually makes the local news. We’re talking about runaway truck ramps.
These emergency escape lanes are built for one purpose: safely stopping heavy vehicles that have lost braking capability on steep mountain descents.
While modern braking systems are extremely reliable, brake failure can still occur when a truck is operating under severe conditions. When it does, a runaway truck ramp can mean the difference between a close call and a catastrophic accident.
Understanding how these ramps work—and why drivers sometimes need them—provides valuable insight into one of the most important safety systems on America’s highways.
Continue reading What Is a Runaway Truck Ramp and Why Are They Needed?When people talk about heavy-duty commercial trucks, the terms “Class 7” and “Class 8” get used constantly throughout the trucking industry.
The biggest difference comes down to:
While both classifications fall into the heavy-duty commercial truck category, Class 7 and Class 8 trucks are designed for very different workloads and operating environments.
If you work around diesel engines long enough, you’ll start to recognize the same names.
Across trucking, construction, agriculture, marine, and power generation, a group of manufacturers has built engines designed to handle load, heat, and long hours.
This guide is a simple overview of the major diesel engine manufacturers around the world – what they build and where you’ll see them.
Cummins produces diesel engines for on-highway trucks, industrial equipment, and power generation.
You’ll commonly see them in:
They are widely used due to broad support and application range.
Caterpillar engines are built for high-load applications like construction, mining, and marine.
You’ll find them in:
These engines are known for durability in demanding environments.
Detroit Diesel focuses on on-highway truck engines.
You’ll find them in:
They are designed for consistent highway performance and emissions integration.
Volvo builds diesel engines for trucks, construction equipment, and marine use.
They also produce engines for:
Their engines focus on integrated systems and efficiency across applications.
Scania produces diesel engines for trucks, industrial equipment, and power generation.
They are known for:
FPT Industrial manufactures diesel engines for:
They focus on multi-application engine platforms.
Deutz specializes in compact diesel engines used in:
Their engines are known for simple, durable designs.
MTU engines are used in high-performance applications like:
They are built for continuous operation under heavy load.
Mitsubishi produces diesel engines for:
Their engines are built for long-duration operation.
Yanmar specializes in smaller diesel engines used in:
They focus on efficiency and reliability in smaller platforms.
Kubota builds compact diesel engines for:
They are widely used in smaller equipment applications.
Isuzu produces diesel engines for:
They are known for reliable commercial engine platforms.
Hino manufactures diesel engines for:
They are commonly used in regional and medium-duty transport.
Perkins engines are used in:
They are known for reliable industrial engine platforms.
John Deere produces diesel engines for:
They focus on application-specific engine performance.
Komatsu builds diesel engines used in:
These engines are designed for heavy-duty off-highway use.
Liebherr produces diesel engines for:
They focus on high-load, specialized applications.
No matter the size or application, these engines are built around the same fundamentals:
The design may change: but the goal stays the same:
👉 Keep equipment running reliably in real working conditions.
Knowing the manufacturer helps you understand:
Because the same issue – like loss of power or overheating – can have different causes depending on the engine platform.
There’s no single “best” diesel engine manufacturer.
Each one is built for a specific purpose.
What matters is:
Because in diesel engines, reliability comes down to understanding the system – not just the name on it.
If you’re working on a diesel engine and need help figuring out:
Visit highwayandheavyparts.com
Or call 844-304-7688 to speak with a diesel parts specialist
From diagnosis through delivery, we’re Highway and Heavy Parts.
