How Much 92 Gasoline Should Remain Before Switching to 95?

[VanEleanor]

To extend the engine's service life, it is recommended to switch to 95 gasoline after the 92 gasoline is completely used up. The relevant details about 92 and 95 gasoline are as follows: 1. Short-term mixing is acceptable: Theoretically, mixing different grades of gasoline for a short period will not cause significant harm to the car. However, since the stability of 92 and 95 gasoline differs, extensive mixing may lead to stability issues. Long-term mixing of different gasoline grades can affect the lifespan of the car's ignition system, fuel injectors, and spark plugs. 95 gasoline produces less knocking than 92 gasoline, making the engine quieter. However, since the compression ratio of engines designed for 92 gasoline is not high enough to fully utilize the characteristics of 95 gasoline, incomplete compression and combustion may occur, leading to sluggish acceleration during driving. 2. Which one is suitable: Some vehicles only require 92 gasoline, but their engines were calibrated during the development phase for 95 or higher-grade gasoline. Therefore, when using 95 gasoline, the characteristics of 95 gasoline can be fully utilized to unlock its potential.