Should the MG5 use 92 or 95 octane gasoline?
2 Answers
The MG5 uses 95 octane gasoline. Composition of 95 octane gasoline: 95 octane gasoline consists of approximately 95% isooctane and about 5% n-heptane. Isooctane has better anti-knock properties, while n-heptane has poorer anti-knock properties. Therefore, the higher the octane rating, the higher the octane number, indicating better anti-knock performance of the gasoline. Each engine undergoes comprehensive evaluation before leaving the factory, and based on the engine's performance and other data characteristics, the required anti-knock properties are determined, which specifies the octane rating of gasoline to be used. Performance of 95 octane gasoline: Higher octane gasoline like 95 octane is suitable for engines with higher compression ratios. This is because as the engine speed increases, the ignition timing in the cylinder advances. When the speed reaches a critical point, the air-fuel mixture in the cylinder may ignite prematurely before the spark plug fires, a phenomenon known as "knocking." Increasing the octane rating of the gasoline can effectively enhance its anti-knock properties.
I always pay special attention to vehicle maintenance information when driving and have looked into the fuel requirements for the MG5. The official manual for this car clearly states that 92-octane gasoline can be used, which is perfectly sufficient for daily city commuting. The main difference between 92 and 95 lies in the octane rating and anti-knock properties, not the quality of the fuel. The manufacturer has already taken China's road conditions and fuel characteristics into account during the design phase. Of course, if you frequently drive fully loaded on highways or climb steep slopes, occasionally using 95-octane might make the throttle response feel slightly quicker, but there's no need to use it long-term. The money saved by using 92-octane is enough to cover several oil changes. As a frugal veteran driver like me, I always follow the manual's recommendations.
