Is 92 or 95 octane gasoline better?

[SanAustin]

Gasoline octane ratings do not indicate quality, but rather reflect different ratios of isooctane. Whether to use 92 or 95 octane gasoline, it is recommended to carefully read your vehicle's owner's manual, which typically provides recommendations and detailed explanations. The fuel tank may also have labeling indicating the appropriate octane rating. Gasoline octane rating: The octane rating represents the ratio of the actual gasoline's anti-knock performance to that of standard gasoline. Higher octane ratings indicate stronger anti-knock performance. Standard gasoline is composed of isooctane and n-heptane. Higher octane ratings are not necessarily better; the appropriate gasoline octane should be selected based on the engine's compression ratio. Difference between 92 and 95 octane: The gasoline octane rating represents the gasoline's octane number. For example, 92 octane gasoline consists of approximately 92% isooctane and 8% n-heptane. Since isooctane has better anti-knock properties and n-heptane has poorer anti-knock properties, higher octane ratings indicate higher octane numbers, meaning the gasoline has better anti-knock performance.