Should the Landwind X7 use 92 or 95 octane gasoline?
2 Answers
According to the official vehicle manual recommendation, the Landwind X7 should use 95 octane gasoline. In addition to checking the suitable gasoline grade in the vehicle manual, the Landwind X7 can also refer to the label on the fuel tank cap. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine 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 gasoline grade cannot be solely determined by the compression ratio. High compression ratio engines can also be tuned to use lower octane gasoline. This is 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 Landwind X7 occasionally uses the wrong gasoline grade, simply switch back to the correct grade after consumption. However, long-term 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 mild, it only increases noise without obvious damage to the engine. 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.
I've been driving my Landwind X7 for almost two years now. According to the owner's manual, this car runs best on 92 octane gasoline, which offers superb cost performance. The price of 92 octane is much cheaper than 95 octane, and the power response is completely adequate for daily city driving. Occasionally, I might feel slightly smoother acceleration when using 95 octane, but the difference is minimal and hardly noticeable - definitely not worth spending hundreds more annually. I've had no issues with long-term use of 92 octane, just remember to regularly maintain the air filter and use fuel system cleaners to keep the gasoline system unobstructed. Don't blindly follow others' recommendations for higher octane fuel unless specified in the manual. In conclusion, following the manufacturer's suggestion is worry-free, economical and reliable - this car was designed to match 92 octane's characteristics. Using more expensive fuel unnecessarily is just wasteful.
