Should Naturally Aspirated Engines Use 92 or 95 Octane Gasoline?

[CarolineDella]

Whether a naturally aspirated engine should use 92 or 95 octane gasoline depends on the type of engine and its compression ratio. If the engine has a higher compression ratio, higher-octane gasoline should be used. Conversely, if the compression ratio is lower, lower-octane gasoline is suitable. For example, household cars equipped with naturally aspirated engines are generally recommended to use 92-octane gasoline, as they typically feature small-displacement naturally aspirated engines with relatively low compression ratios, making 92-octane sufficient for their operational needs. Naturally aspirated engines rely on atmospheric pressure to draw air into the combustion chamber without the use of any forced induction devices like turbochargers or superchargers.