Diesel fuel, petroleum gas or diesel fuel is used as fuel for diesel engines and thermal equipment. Its hydrocarbon range is between C14-C20 and even C25 with the boiling point range of 385-250 ° C. The oil is composed mainly of three groups of paraffin, naphthenic and aromatic, with a minimum flash point of 54 ° C and a maximum drop point of 0 ° C. 

Its density is 820-860 kg / m3 at 15.6 ° C. The most important feature is the number of Cetane, which should be more than 50 so that the soft and quiet engine works.