Benefits of a Diesel Generator

So, what are the benefits of diesel generators over petrol generators?

Diesel is still the most popular fuel type for portable generators. This is in part due to a number of advantages diesel powered generators have over petrol or gas powered generators.

  1. Diesel engines are more fuel efficient that petrol engines. This means longer running time when running at the same capacity. Some diesel engines consume up to half as much fuel as compatible petrol engines.
  2. Diesel fuel is cheaper than petrol meaning diesel powered generators are cheaper to run.
  3. Diesel powered engines require less maintenance than petrol engines. This is in part due to diesel engines not having spark plugs or carburetors. This means no need to replace spark plugs or rebuild carburetors. The major ongoing service requirement for a diesel engine is regular oil changes.
  4. In terms of life span, a diesel engine is much longer lasting. When compared to a typical petrol engine, a diesel engine can last up to 3 times longer.
  5. Diesel fuel is safer with less risk of ignition when compared to petrol.
  6. Often portable diesel generators are transported on the back of diesel utes. This means you don’t need to have two different fuel types when you’re out and about doing work.
Diesel Generator


What are the disadvantages of diesel generators when compared to petrol generators?

  1. Noise level – diesel engines are typically louder than compatible petrol engines (although some models now come with soundproof casing). This can be detrimental in certain situations like camping for example.
  2. Diesel engines are made from large, heavy components. Servicing and repairs can be more expensive as a result. This disadvantage is often mitigated by the more infrequent maintenance requirements for a diesel engine when compared to a petrol engine.
  3. While in operation, diesel engines are considered less environmentally friendly with more emissions than petrol engines.

If you only need the benefits of a portable generator infrequently, then it may be cheaper to go with a petrol model. If on the other hand you intend to use your generator more regularly, a diesel generator may be a better option.

Even after weighing up the advantages versus the disadvantages, many come to the conclusion that due to the longer life and lower maintenance requirements, a diesel powered generator is the way to go.