Should the Xingrui use 92 or 95 octane gasoline?

[LeSerenity]

According to the official vehicle manual recommendation, the Xingrui should use 95 octane gasoline. In addition to checking the appropriate gasoline grade in the vehicle manual, the Xingrui's fuel cap also indicates the recommended octane rating. Typically, the choice of gasoline grade can also be determined by the engine's compression ratio. Vehicles with a compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade, as high compression ratios can be adjusted to use lower octane gasoline. Other factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also influence the decision. Generally, the higher the gasoline octane rating, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the Xingrui occasionally uses the wrong gasoline grade, simply switch back to the correct octane rating after the current tank is used up. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, using a higher octane rating will not cause damage, but the increased octane number may alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles recommended to use higher octane gasoline, using a lower octane rating can cause engine knocking. Due to the significantly lower octane number, the gasoline ignites prematurely during the compression stroke. If combustion occurs before the spark plug fires, resistance is created during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without noticeable engine damage, but severe knocking indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring in extreme cases.

[OHarmony]

As a regular owner of a Xingrui, I usually opt for 92-octane fuel because it's cheaper, saving me quite a bit on fuel costs. 92-octane is generally sufficient for daily commuting, but I notice smoother performance with 95-octane—acceleration feels lighter, especially on long drives where it reduces stuttering. According to the manual, 95-octane better suits the Xingrui's engine design, offering stronger anti-knock properties and more stable power output. If you mostly drive in the city, occasional 92-octane is fine, but remember to check the engine regularly to prevent carbon buildup. I mix them without major issues, but beginners should stick to 95-octane for longer engine life and fewer minor problems. Driving comfort and safety matter most—don’t overlook details just to save money.

[LeMaddox]

From a maintenance perspective, the Xingrui engine is designed for high performance, and 95-octane gasoline with its higher octane rating effectively prevents knocking, which is particularly crucial for turbocharged engines. While using 92-octane may save money in the short term, it can lead to reduced power, increased fuel consumption, and even damage to internal cylinder components over time. I recommend owners prioritize 95-octane fuel and pay attention to the condition of spark plugs and injectors during regular maintenance. On bumpy roads or when rapid acceleration is needed, 95-octane responds more promptly. Gasoline choice is no trivial matter—it directly impacts driving experience and maintenance costs, and neglecting it may result in hidden expenses. Remember, an engine is like a body; feed it well to ensure longevity.

[LeXavier]

As a new owner of the Xingrui, I was also torn between using 92 or 95 octane fuel when I first got the car. After researching, I found that 95 octane is more highly recommended due to better compression ratio and power optimization. Since switching to 95, the throttle response has been quicker, and cold starts are smoother. While 92 is cheaper, I occasionally noticed the engine shuddering. Experienced drivers all advised sticking with 95 to avoid complications. Using the wrong fuel might trigger warning lights and require a trip to the dealership. On highways, 95 octane provides more peace of mind and even slightly better fuel efficiency. In short, as a newbie, it's best to follow the manual—safety first.