How Does a Diesel Engine Differ from a Gas Engine

If you have ever wondered how different diesel engine and gas engines are, we have put together some information on how the two differ and how they are the same.  First of all, diesel gets great mileage. Diesel cars usually deliver 25 to 30 percent better fuel economy than similarly performing gasoline engines. Diesel also can provide as much or more fuel economy than traditional gasoline-electric hybrids, depending on the models involved.

Cost for diesel vs. gasoline

Although diesel fuel used to be less expensive than gas, it now often costs the same amount or more. However, even if there is an increase in price, diesel fuel would have to be at least 25 percent more expensive than gas to erase the cost-advantage of a diesel engine’s fuel efficiency.

One of the most efficient fuels available today is diesel fuel. Because it contains more usable power than gasoline, it delivers better fuel economy. Although diesel fuel is more efficient because it converts heat into energy rather than sending the weather out the tailpipe as gas-powered vehicles do, it does not result in high-speed performance.

How do diesel and gas engines work

Modern car engines work on the standard principle of four simple strokes: intake, compression, power, and exhaust. Whether powered by gasoline or diesel, the engine strokes are the same. However, there are critical variances as to how the strokes perform.

For gasoline engines, the intake will pull fuel and air into the combustion chamber. A diesel engine, on the other hand, will only be drawing in air. The next stage is compression, and both engine types will squeeze down the air. Gasoline engines will use a spark plug to time and start the power stroke. A diesel engine, on the other hand, only has a pocket full of hot air before the power stroke.

Maintenance and tune-ups

Diesel has no spark plugs or distributors. Therefore, they never need ignition tune-ups. However, you still need to change the oil and the air, oil, and fuel filters.

Diesel engines are more rugged to withstand the harshness of higher compression. Therefore, they usually go much longer than gas-powered vehicles before they require major repairs. In fact, some diesel cars can go hundreds of thousands of miles before needing major repairs.

However, you still need to proper maintenance on a diesel. For instance, if the fuel injection system breaks down, you may have to pay a diesel mechanic more money than you would repair a gasoline system because diesel engines are more technologically advanced.

The mechanics at Britton’s know that diesel engines are different from gasoline-powered engines and know how to repair and maintain your diesel truck. Call us to schedule an appointment. (928) 505-3535


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