Fuel oil is a fraction distilled from crude oil and is called a liquid that is used to burn in furnaces, boilers or power generation engines. Fuel oil is a fraction of crude oil whose flash point is about 40 degrees. Fuel oil consists of long-chain hydrocarbons, especially alkanes, cycloalkanes, and aromatics, and is included in the category of heavy industrial fuels; so that it is heavier than diesel and naphtha. The length of the produced fuel oil chain varies depending on the type of application.

Diesel fuel, diesel oil (Gasoil) is a liquid fuel specifically designed for use in diesel engines such as light and heavy vehicles, generators, boats and ships, industries and power plants, pleasure boats and rail transport.  Diesel is obtained from the middle height of the atmospheric distillation tower of the refinery in one phase (200 to 350 degrees Celsius) by cooling the oil in several stages, and after processing and reducing disturbing elements and mixing with a small percentage of kerosene (up to 5%). And the modification of some specifications, such as flash point and boiling point, to standard indicators, is launched on the market.

Liquefied gas or LPG refers to two hydrocarbon gases, butane and propane, or their combination, which are kept in a liquid state. Usually, small amounts of compounds such as propylene and butylene are also present in liquid gas. LPG is mostly used for heating applications and as fuel for vehicles. It is also used in making sprays and as a cooling gas in cooling devices such as refrigerators and freezers.

Bitumen is a hydrocarbon material, black and paste-like, which is most widely used in moisture insulation and asphalt construction.

Base oils are the most important components of lubricants in terms of volume, and in terms of weight, on average, they make up more than 95% of the formulation of a roller.