Can I Add 95 Octane Gasoline Before the 92 Octane is Completely Used Up?

[PaisleyDella]

It is not recommended to add 95 octane gasoline before the 92 octane is completely used up. Gasoline is a mixture, and the octane rating we usually refer to indicates the fuel's different anti-knock indexes. Short-term use will not cause significant damage to the engine because the anti-knock performance of gasoline itself is improving. The chemical compositions of the two gasoline types are relatively similar, but they contain different additives. Prolonged mixing can affect ignition timing, leading to higher fuel consumption and lower power output. The octane rating is an indicator of anti-knock performance and is essentially unrelated to cleanliness, power, or combustion value. The higher the octane rating, the stronger the fuel's ability to resist engine knocking. The main difference between 92 octane and 95 octane gasoline is that 95 octane has a stronger anti-knock capability than 92 octane.