Myths About Diesel Engines and Generators

2 Feb 2018
Joseph Russo

Through the years, diesel engines and generators have suffered from myths that are not true. A few of these include:

Diesel Engine Myths:

  • Cause smoke and noise
  • Are Sluggish
  • Fuel Costs More
  • Are dirty


Smoke and Noise

In reality, diesel engines have been developed to the point of being as quiet as a passenger car. Vehicles using this diesel fuel, including both trucks and cars, emit less NOx because of DPFs (diesel particulate filters), EGR (exhaust gas re-circulation), SCR (selective catalytic reduction} and urea injection.

Today’s generators with naturally aspirated or turbocharged engines are equipped with silencers and mufflers. These assures that the least noise possible escapes when the generator is in use.


Engines are Sluggish

Today’s diesel engine has turbochargers which run off “free energy” also known as thermodynamics. These are pumps which are driven by exhaust gas to provide more air in the combustion chamber and allow more fuel to be added. This provides more power than the average automobile engine.


Fuel Costs More

For many years diesel was very inexpensive. Although it costs less to produce than gasoline, due to user taxes the price has risen to be even with or more than regular gasoline. Studies have found that, compared to gas engines, diesel provides a fuel economy of up to 30% better.


Diesel Engines are Dirty

In reality, diesel is one of the cleanest products on the market today. The industry standard for diesel powered vehicles is ultra low sulfur diesel (ULSD). There is also Red Dyed/Off-Road ULSD which is generally used for construction equipment, generators and farms.


Generator Myths:

  • Size is not Important
  • Ratings are the Same
  • Difficult to Keep Filled with Fuel on a Job


Generator Size is not Important

Diesel generators are designed for all types of situations and it is essential to have the correct size if maximum benefits are to be realized. This may be on a simple construction site or running an entire hospital with an emergency electric shut-down option. Generators are classified as commercial, industrial, semi residential, residential, critical or super critical.


Ratings are the Same

Diesel generators are provided with a manufacturer’s ratings for each specific model. A generator may be considered a ‘standby’, only operating a few hours per year, or one that must operate continuously. The same model may have a lower rating for continuous service compared to a higher one for standby.


Difficult to Keep Fuel Filled on a Job

Many of today’s construction sites find the use of generators beneficial for welding and other work that needs power. This makes it important to have contact with a company that provides a reliable diesel fuel refilling program which will help avoid any shut-down during important time constraints.

Diesel generators are essential in locations where emergency power is required. These are popular where there is no connection to a power grid and are often used on construction sites due to their superior efficiency. A compression-ignition engine is available which is designed to run on diesel for fuel. Naturally, these generators need a regular delivery of fuel to maintain the required power on a job.


Whether you have a construction site, fleet headquarters, a farm or other location where diesel fuel is needed we, at City Oil, are happy to supply the state of Connecticut, Western Massachusetts and the surrounding area with this product. Give us a call today at 800-581-0000 or online at to learn more about our pricing, delivery practices and our quality service to our many customers.