What are the effects of using gasoline with different octane ratings in cars?

[EvaAnn]

Effects of using gasoline with different octane ratings in cars: If lower-octane gasoline is used, the engine may not perform at its best, and it could affect the engine's lifespan. However, for most vehicles, using higher-octane gasoline does not harm the engine. For new cars, the performance difference may not be noticeable, but for older vehicles with many years of use, the performance improvement can be more apparent. The octane rating of gasoline represents its resistance to knocking. For example, 92-octane gasoline consists of approximately 92% isooctane and 8% n-heptane. Since isooctane has better anti-knock properties compared to n-heptane, a higher octane rating indicates better anti-knock performance of the gasoline.