Gas oil is widely used in most types of transportation. Also used in Generators, Agriculture motors, Gas oil is a middle distillate, rebated fuel which is commonly referred to as red diesel. It is predominantly used for non-road mobile machinery and commercial heating, Sulfur continues to be the key parameter of focus for diesel fuel, with sulfur limits ranging from 10 ppm to 10,000 ppm for on-road diesel grades, and from 10 ppm to 30,000 ppm for off-road diesel grades, Diesel fuel is more efficient than gasoline because it contains 10% more energy per gallon than gasoline.