Petrol

Petrol is defined as a mix of light hydrocarbons, with molecules of 4 to 12 carbon atoms, liquid at ambient temperature and pressure conditions, suitable to be used for internal combustion engines with spark ignition.
On average, petrol has a distillation interval between 30°C and 200°C.

Finished petrol is obtained by mixing components from various plants. While, in the few refineries still without conversion plants (so-called hydroskimming refineries), the petrol is produced by mixing isomerised and reformed together (with possible additions of MTBE), in the other refineries, light cracking naphtha and alkylate (possibly with a bit of butane in the winter months) can be used.
Minimal quantities of additives can also be put in to give added properties to the petrol (e.g. detergency).