Is it okay to use 92 most of the time and occasionally switch to 95?

[StLevi]

It is acceptable to use 92 most of the time and occasionally switch to 95. Using higher-octane fuel in a vehicle designed for lower-octane fuel will not cause any issues, though it may waste some of the fuel's performance potential. However, using lower-octane fuel in a vehicle designed for higher-octane fuel can lead to engine knocking. Here is some relevant information about gasoline: Meaning of gasoline octane ratings: The octane rating represents the ratio of the actual gasoline's anti-knock performance compared to standard gasoline. The higher the octane number, the stronger the anti-knock performance. Composition of gasoline: Standard gasoline is composed of isooctane and n-heptane. Higher octane numbers are not necessarily better; the appropriate octane rating should be selected based on the engine's compression ratio. Isooctane has good anti-knock properties and is assigned an octane value of 100, while n-heptane has poor anti-knock properties and is prone to knocking in gasoline engines, hence assigned an octane value of 0. If gasoline has an octane rating of 90, it means this gasoline has the same anti-knock performance as standard gasoline containing 90% isooctane and 10% n-heptane.