In a vehicle that has an internal combustion engine and an exhaust system fitted with a catalytic converter, what type of fuel must be supplied to it?

Question

DentroTest · Accepted Answer

Catalytic converters installed in the exhaust system of internal combustion (gasoline) engines are intended to reduce polluting emissions by transforming harmful gases through chemical reactions. The presence of lead in the fuel irreversibly destroys and disables the active substances of the catalytic converter (commonly known as poisoning the catalytic converter). That is why any gasoline vehicle with a catalytic converter is required to be refueled with unleaded gasoline. Mixing gasoline with oil corresponds to two-stroke engines and would also damage the catalytic converter, while type C gas oil is a heating fuel not suitable for automotive use.

In a vehicle that has an internal combustion engine and an exhaust system fitted with a catalytic converter, what type of fuel must be supplied to it?

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