Oil
European Commission - Eurostat

International Energy Agency (IEA)
Coming from the Latin petra, meaning rock, and oleum, meaning oil, the word "petroleum" is often interchanged with the word "oil". Broadly defined, it includes both primary (unrefined) and secondary (refined) products.

Oil or oil products in Eurostat cover crude oil, feedstocks and all petroleum products.

Petroleum is a complex mixture of liquid hydrocarbons, chemical compounds containing hydrogen and carbon, occurring naturally in underground reservoirs in sedimentary rock. Coming from the Latin petra, meaning rock, and oleum, meaning oil, the word "petroledum" is often interchanged with the world "oil". Broadly defined, it includes both primary (unrefined) and secondary (refined) products.

Crude oil is the most important oil from which petroleum products are manufactured but several other feedstock oils are also used to make oil products. There is a wide range of petroleum products manufactured from crude oil. Many are for specific purposes, for example motor gasoline or lubricants; others are for general heat-raising needs, such as gas oil or fuel oil.

Oil supply and use in industrialised economies is complex and involves both energy use and non-energy use.

UNSD Energy Statistics Section
Oil covers both crude oil and petroleum products.

Petroleum products comprise the liquid fuels, lubricant oils and solid and semi solid products obtained by distillation and cracking of crude petroleum, shale oil, or semi refined and unfinished petroleum products. Data in this category include fuels consumed in refining, but exclude oil products obtained from natural gas, coal, lignite and their derivatives.