What’s in your tank?

In its purest form, petrol is nothing but a string of carbon and hydrogen atoms. It is distilled and separated from crude oil (petroleum) through the refining process. Unlike other oil-based fuels like butane or propane, petrol has a relatively high boiling point, making it more stable. But the gas at the pump isn’t pure petrol. It contains a blend of additives and stabilisers that help the fuel burn cleaner, store longer and make your engine run efficiently. Additives called oxygenates increase the oxygen content of petrol, enhancing its octane level and helping it burn cleaner. Antioxidants are added to decrease the formation of sediments in tanks. Finally, detergents and anti-corrosive agents are added to keep engines running clean.