The correct option is "gasoline"
The first combustion engines in cars, the Otto engines, were developed in the last quarter of the 19th century in Germany, the fuel was a relatively volatile hydrocarbon obtained from coke gas with a boiling point near 85 ° C, which was very suitable for the first carburetors. The development of a "nozzle" in the carburetor allowed the use of less volatile fuels. Other improvements in the efficiency of the engine were tried with a higher compression ratio, but in the first attempts they made detonations (premature fuel explosion). In the 1920s, antiknock compounds were introduced by Thomas Midgley and Boyd, specifically with tetraethyl lead (TEL). This innovation initiated a cycle of improvements in fuel efficiency that coincided with the large-scale development of oil refining to provide more products in the boiling range of gasoline. In the 1950s oil refineries began to focus on high-octane fuels, and then gasoline detergents were added to clean jets in the carburetors.
