What You Should Know About Diesel Engines

What You Should Know About Diesel Engines

Diesel engines, also called compression-ignition engines, are an alternative to gasoline (petrol) engines for a vehicle’s power source. They were invented in the late 19th century, but have taken a long time to become accepted because of concerns over the soot they produce; however, due to recent efforts to reduce pollution, diesel engines have become increasingly popular. This article will look at how diesel engines work, how they are different from gasoline engines, and what makes them a good option.

Brief History of Diesel Engines

The pioneer of the first generation of diesel tech was Rudolf Diesel. Rudolf began working on the construction of this type of engine during the increase in the output of steam engines for large industries. The refinement of this engine was a slow and tedious operation, taking Rudolf up to twelve years to hit conditions that were appropriate for market testing.

As the evaluation of diesel technological advances had become more publicly known, numerous different technologists developed an interest in the validity of the innovation and began working together to create a diesel engine competent with operating in various automotive applications. 

Although Rudolf had patented earlier diesel engine designs, he eventually gave up being involved in its continued expansion, allowing other innovators to imprint it all out and contribute to making it what it is today.

How Does a Diesel Engine Work?

A diesel engine works differently from a gasoline (petrol) powered engine. A diesel engine compresses air within the cylinder, then forces in the pressurized air and fuel into an oxidizing environment – this is called compression ignition. Diesel engines are often considered better for trucks or large vehicles because they have greater torque and can reach full power at low RPMs, but these advantages can be detrimental in small, compact cars.

What Should You Consider When Buying a Diesel Engine Vehicle?

Diesel-powered vehicles have gained popularity, and have emerged as a leader in the race for eco-friendliness.  It is said that diesel engines are more fuel-efficient, and produce fewer emissions than their gasoline equivalents. But, there is more to these vehicles than meets the eye.

  • Consider the Exhaust
  • Consider the Oil
  • Try Starting the Vehicle
  • Take a Look at the Radiator
  • Observe the Color Exhaust Smoke
  • Look at the General Handling take it for a drive

Pros of a Diesel Engine

Excellent Gas Mileage

The first advantage you have when it comes to a diesel engine is the excellent gas mileage. You will be able to travel further and get more miles per gallon when you have a diesel vehicle. There are several models and brands available today that are very efficient and can provide you with miles of excellent fuel efficiency on each trip.


The diesel engine is around 30% more efficient than its counterpart, the gasoline engine. This is a primary reason why heavy trucks (big rigs) use diesel engines.

Better Durability

It is challenging to achieve and maintain the top performance of any engine and diesel engines are no exception. However, diesel engines have much better durability than their gasoline equivalents. That is why, if you choose a Diesel engine for your truck, bus, or boat, chances are that the engine will serve you very well for many years. With the appropriate maintenance, this engine can work for decades without major issues.


There are a lot of benefits to owning a diesel engine over the alternative, gasoline. The extra benefit of diesel engines is their versatility. You can drive further with fewer stops to refuel. Also, diesel engines have been used in many forms of heavy duty transportation for decades now, including most trucks and heavy machinery.

Diesel Engines Have no Spark Plugs or Distributors

Since diesel engines have no spark plugs or distributors, they never need ignition tune-ups. Also, because there is no need to tune up the ignition, diesel also doesn’t have timing belts to adjust and maintain.

Higher Torque Translation

Many people like diesel because there is little that can beat the power of a diesel engine. A diesel engine will produce more torque and push more power down to the wheels. Engineers at https://samechanic.com/how-frequently-should-you-have-diesel-engine-maintenance/ explain that the diesel also has a much higher compression ratio than its counterpart, the gasoline engine. This means that when you press on the gas pedal you can feel a much stronger push giving you better acceleration.


Complex Maintenance Procedures

One of the major problems with diesel vehicle engine parts is that they are more complex compared to their gasoline counterparts. If you are not a skilled mechanic, you would need to hire a mechanic to do routine maintenance like changing and mapping new injectors. 

Fuel Filters Get Worn out More Frequently

Every engine has a fuel filter that is designed to keep contaminants from entering the fuel delivery system. Since this part gets clogged relatively frequently, drivers end up having to replace it more often, which isn’t cheap in contrast to other maintenance parts. One advantage of replacing a fuel filter is that it generally prolongs the lifespan of the other parts of the engine.

Slightly Louder Engine Noise

Diesel engines are slightly noisier than other types of engines. This can be an issue in suburban areas or if you like to take road trips cross-country.

Who Should Consider a Diesel Engine?

You’re looking at vehicles now and not sure if you should pick a diesel engine vehicle or a gasoline engine vehicle. Or maybe you are still trying to decide between which one is better for your driving needs. You should consider a diesel engine if you:

  • Travel long distances, but don’t want to stop for fuel as much.
  • Need better fuel efficiency.
  • Want all the power of a standard petrol engine.
  • Want to have greater resale value for your vehicle.
  • You want to save fuel, but you also want a full-size car.
  • Don’t really want to plug the vehicle in order to get a decent fuel efficiency.

Maintenance Tips for Diesel Engines

In general, diesel engines are a lot more fuel-efficient than gasoline engines. They also offer higher torque in heavy-duty vehicles. Scheduled maintenance services are a vital part of diesel engine ownership. These practices include:

  • Keep it clean – now and then we advise you to use some injector cleaner.
  • Monitor your coolant.
  • Fuel filter changes.
  • Effective air filters.
  • Appropriate oil changes.

Every type of engine is different in its own way, but there are some basic things that apply to them all. Hopefully, this article has presented you with a good understanding of how diesel engines work and how they differ from other kinds of engines.