Lavida Plus: Should I Use 92 or 95 Octane Gasoline?

[John]

According to the official vehicle manual recommendation, the Lavida Plus should use 92 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, you can also find it marked on the fuel tank cap of the Lavida Plus. Typically, the gasoline grade can also be determined based on 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 gasoline grade. High compression ratio engines can also be tuned to use lower octane gasoline because, besides the compression ratio, other factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline octane number, the higher the octane value 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 Lavida Plus occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, prolonged use of the wrong gasoline grade can have the following effects: For vehicles recommended to use lower octane gasoline, using higher octane gasoline will not cause damage, but the increase in octane value will alter the fuel's ignition point, leading to delayed combustion in the engine. This means both the engine's power output and thermal efficiency will decrease, resulting in poorer performance. For vehicles recommended to use higher octane gasoline, using lower octane gasoline can cause engine knocking. Due to the significantly lower octane value, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug ignites during the compression stroke, resistance will arise during the upward stroke. This resistance makes the engine run very unstably. If the knocking is imperceptible, it only increases noise without obvious engine damage. However, noticeable knocking indicates severe engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.

[VanElaina]

I noticed the Lavida Plus owner's manual clearly recommends using 95-octane gasoline, mainly because its engine has a relatively high compression ratio. The 95-octane fuel's appropriate anti-knock properties help reduce engine knocking and make the car run smoother. After using 95-octane for over a year, I feel the acceleration is more responsive, and fuel consumption stays stable around 7L/100km. Long-term use can extend engine life. However, 92-octane isn't absolutely forbidden - it's fine for emergency use, but shouldn't be used regularly as it may increase carbon deposits and lead to higher maintenance costs. The key is to consider your vehicle's actual condition. I always check the fuel cap label before refueling to ensure safe driving.

[SanMichael]

The Lavida Plus is more suitable for 95-octane gasoline. Although the cost is higher, the performance is more stable. I initially considered saving money by using 92-octane, which is cheaper, but in actual tests, 95-octane has higher combustion efficiency, resulting in slightly lower fuel consumption per kilometer in the long run. For example, last month during a long-distance trip, I felt significant engine vibration when using 92-octane, but switching back to 95-octane made it quiet again. The engine design of this car is relatively advanced, with a compression ratio of about 10.5, making 95-octane a better match to avoid knocking and component damage. Using 92-octane occasionally in emergencies is fine, but avoid long-term use, as it could clog the fuel injectors and lead to costly repairs. Ultimately, it depends on your budget and driving habits.

[Morris]

I've researched the Lavida Plus. Its engine requires 95-octane gasoline, as 92-octane may cause premature ignition. With a high compression ratio, 95-octane offers better durability, reducing engine noise and wear. Frequent use of 92-octane may lead to valve carbon buildup over time, affecting power and fuel efficiency. The manual emphasizes 95-octane as optimal for proper electronic control system operation. While 92-octane can be used in emergencies, don't make it a habit. Maintenance key lies in consistent fuel usage—avoid frequent switching.