Diesel power is more commonly utilized within the workforce. The reason for this is because they tend to be more efficient than other types of engines. Diesel engines also tend to be less costly and are easier to be repaired than other types of engines like gasoline combustion engines. Another significant reason for using diesel engines is the fact that diesel supplies more fuel efficiency then other engines.
Diesel fuel has higher energy density than regular gasoline fuel. Because of this, they burn less fuel for the same amount of output. This is an obvious money saver. Not much needs to be said regarding fuel efficiency, specially in this day and age where costs have recently skyrocketed to all time highs.
Finding replacement parts and actually servicing the engines is easier compared to regular gasoline engines. This equates not only to savings due to having to buy things, there is also savings due to the smaller amount of time required to fix said engines. Time is money. Another thing that is often ignored about diesel engines is the fact that the fuel itself has the ability to act almost like a lubricant to the engine. When you consider the fact that the fuel is so much heavier, the engine will waste less heat and therefore the parts themselves will last longer. There is better savings all around.
Now some people will complain that diesel engines are weak when it comes to power. Starting from a dead stop, many diesel powered vehicles are slow as molasses compared to their gasoline powered cousins. Although this is generally true, many people are unaware that these engines can be tweaked in such a way as to improve power without having to sacrifice on fuel efficiency. That information will be saved for another post. In the meantime, we can still appreciate the fact that these engines have better torque and are superior when it comes to hauling heavy loads.
For work related vehicles, specially dealing with tasks that involve moving heavy loads, diesel is the superior choice. These engines bring better fuel efficiency, they cut down on maintenance costs, they last forever and they can move heavy objects with greater ease. The one major drawback of the diesel engine can be compensated for with a little specialized tinkering on the engine. Emissions have been a drawback as well, though currently there has been a lot of work devoted towards producing even cleaner engines. Diesel powered engines are inevitably going to make a comeback.