How to Know Whether to Use 92 or 95 Octane Gasoline for Your Car

[VonJune]

To determine whether your car requires 92 or 95 octane gasoline, check the label on the inside of the fuel tank cap or the owner's manual. 92-octane gasoline is suitable for gasoline-powered vehicles with an engine compression ratio between 8.6 and 9.9. 95-octane gasoline is suitable for gasoline-powered vehicles with an engine compression ratio between 10.0 and 11.5. Below is additional information about gasoline grades: 1. Gasoline grade: It represents the ratio of the actual gasoline's anti-knock performance to that of standard gasoline. The higher the grade, the stronger the anti-knock performance, but higher grades are not necessarily better. The primary criterion for selecting a gasoline grade is the engine's compression ratio, which is also a key energy-saving indicator in modern vehicles. 2. Delayed ignition: If an engine designed for 92-octane gasoline is forced to use 95-octane gasoline, "delayed ignition" may occur. This means the fuel does not reach its auto-ignition point even when fully compressed, leading to incomplete combustion.