Can 92 Octane Gasoline Be Mixed with 95 Octane?

[LaAlexander]

Yes, but it is not recommended for long-term use. Generally speaking, engines with a compression ratio between 8.5-9.5 typically use 92 octane gasoline, while engines with a compression ratio above 9.5 usually use 95 octane gasoline. However, this is not absolute and depends on the tuning by the car manufacturer. Occasionally mixing 95 octane gasoline with 92 octane once or twice will not have a significant impact, but it is not recommended. Below is some relevant information: 1. Anti-knock Performance: 92 and 95 octane are fuel grades, but the fuel grade does not represent the quality of the gasoline. The difference between them lies in their anti-knock performance, which essentially means the octane rating varies. Different types of engines have different compatibility requirements. If you refuel at a reputable gas station, the quality of the gasoline will not be affected. 2. Compression Ratio: Different engines have different compression ratios. Engines with a compression ratio of 8.5-9.5 generally use 92 octane gasoline, while engines with a compression ratio above 9.5 typically use 95 octane gasoline. Long-term mixing of different fuel grades can have a certain impact on the lifespan of the car's ignition system, fuel injectors, and spark plugs.