Can I Add 95 Gasoline When 92 Gasoline Is Not Fully Consumed?

[SanHector]

92 gasoline and 95 gasoline can be mixed, and there will be no issues when using different grades of gasoline together. As long as your car allows the use of 92 gasoline, you can mix 92 and 95. However, if your car requires a minimum of 95 gasoline, then mixing is not allowed, as it may affect engine knocking. Here are some additional details: 1. Knocking: It is an abnormal combustion phenomenon in the engine, occurring during the compression stroke. 2. During the compression stroke: The engine's intake and exhaust valves are generally closed, and the piston moves upward to compress the combustible mixture. If the gasoline's stability is poor, the compressed combustible mixture may ignite prematurely. Premature combustion of the mixture will push the piston downward while it is moving upward, which can lead to insufficient engine power output and may also affect fuel efficiency. 3. Different grades of gasoline have different octane levels: The higher the grade, the higher the octane level, and the better the stability of the gasoline.