Should the Hongqi HS5 use 92 or 95 octane gasoline?

[MayaLynn]

The Hongqi HS5 requires the use of 95 octane gasoline. The Hongqi HS5 is equipped with a 2.0-liter turbocharged engine across all models, which means this vehicle cannot use 92 octane gasoline and must use 95 octane gasoline. If 92 octane gasoline is used, the engine may experience knocking, leading to reduced power, increased fuel consumption, and potential engine damage. Below are the differences between 92 and 95 octane gasoline: 1. Composition difference: 92 octane gasoline consists of 92% isooctane and 8% n-heptane, while 95 octane gasoline consists of 95% isooctane and 5% n-heptane. The primary difference lies in the purity of isooctane—the higher the purity, the stronger the gasoline's anti-knock properties, and the relatively higher the price. 2. Stability difference: 95 octane gasoline has particularly good stability, but it is also more prone to combustion. The octane rating of 92 octane gasoline is 90%, while that of 95 octane gasoline is 95%. 3. Applicable vehicle difference: When choosing between 92 and 95 octane gasoline, it is necessary to follow the vehicle's user manual. Generally, lower-end vehicles can use 92 octane gasoline, while higher-end vehicles require 95 octane gasoline to meet the engine's demands.