Diesel is actually only one form called petro diesel. It comes from petroleum, and is an unrefined fuel. The best Diesel engines fuel enjoy very high compression ratio and low fuel consumption per horsepower when compared to gas powered engines. They also have better torque ratios.
They do not have spark slugs for ignition, and can ignite themselves. While these may be pros for looking into a diesel powered engine, when repairs are needed, a regular repair shop may not be able to complete the job with as much knowledge as a trained diesel specialist.
There are many differences between gasoline engines and diesel engines. The average driver, who has been driving a gasoline-powered vehicle, cannot simply jump into a diesel truck and assume that he or she can continue with business as usual. Further, this driver cannot expect the vehicle’s maintenance practices to be the same.