Should the Roewe i5 use 92 or 95 octane gasoline?
2 Answers
Roewe i5 can use either 92 or 95 octane gasoline, and the manufacturer recommends a fuel grade of 92 or above. The differences between gasoline grades and considerations for choosing the appropriate grade are as follows: Differences between gasoline grades: The difference between 92 and 95 octane gasoline is not in quality but in the content of added isooctane. 95 octane gasoline contains 95% isooctane and 5% n-heptane, while 92 octane gasoline contains 92% isooctane and 8% n-heptane. The higher the isooctane content, the stronger the gasoline's anti-knock performance and the more expensive it is. Therefore, 95 octane gasoline has better anti-knock performance than 92 octane gasoline. Considerations for choosing the appropriate gasoline grade: Under normal circumstances, it is not recommended to switch to a gasoline grade lower than the standard specified in the vehicle manual. Using a lower-grade gasoline may cause premature combustion, leading to engine knocking. Additionally, incomplete combustion of gasoline can increase carbon deposits, potentially clogging the fuel injectors and fuel lines, resulting in fuel supply interruptions and engine stalling. Mixing different grades of gasoline is also not advisable, as long-term use can cause engine damage, such as increased carbon deposits and higher fuel consumption.
I've been driving the Roewe i5 for over three years, using 92-octane gasoline, and it feels very economical. The engine design of this car is compatible with 92-octane, and the manufacturer's manual clearly recommends it. Using 92-octane is sufficient for daily use, saving a lot on fuel costs, especially in years with high gas prices. Although 95-octane is more expensive and has a higher octane rating, theoretically providing smoother acceleration, in practice, the difference is minimal unless you frequently drive long distances or seek explosive power on highways. I've tried both types of fuel myself, and there wasn't much change in fuel consumption. The key is to regularly change the engine oil and maintain the car. Using the wrong octane might lead to carbon buildup or reduced efficiency, so it's safest to follow the manual. Also, pay attention to the quality of the gas station—don't compromise on cheap, low-quality fuel, as that's better for the engine.
