What Are The Main Constituents Of Petrol?

Gasoline is actually a liquid mixture which is derived from Petroleum. It is used as fuel specifically in internal combustion engines.

Petrol consists of the following ingredients:

- Aliphatic Hydrocarbons
- iso-octanes and aromatic hydrocarbon toluene
- Benzene
- Ethanol
- Lead
- MMT
- Dye
- Oxygenated blending

Petrol consists of:
Aliphatic hydrocarbons including:
Aliphatic-Straight chains (E.g., Heptane),
Aliphatic-Branched (E.g., Iso octane)-30-50 %,
Aliphatic-Cyclic (E.g., cyclopentane)-20-30 %,
Aromatic Hydrocarbons (E.g., Ethyl benzene)-20-30 %
[Source: Virtual Chembook]

Water and diesel

Petrol is a fraction of crude oil made up of many hydrocarbons.