Should the Fista use 92 or 95 octane fuel?
2 Answers
The Fista's engine specifies a minimum fuel octane rating of 92, so this engine can use 92 octane fuel or higher. For long-term use, it is recommended to fill up with the specified 92 octane fuel. Differences in gasoline: In fact, the main difference between 92 and 95 octane gasoline is the octane value. 92 octane gasoline consists of 92% isooctane and 8% n-heptane, while 95 octane gasoline consists of 95% isooctane and 5% n-heptane. The higher the octane value of the fuel, the better its anti-knock performance. Anti-knock performance: The anti-knock performance of gasoline refers to its ability to resist knocking during combustion in the engine. You may often hear about knocking in engines, which is actually an abnormal combustion phenomenon of gasoline.
I've encountered this issue with similar models before. For a family car like the Fiesta, 92-octane gasoline is the most suitable. While 95-octane is more expensive, it doesn't offer significant performance improvements since the engine is tuned for 92-octane. Switching unnecessarily may lead to incomplete combustion and increased fuel consumption. The owner's manual typically recommends 92-octane, so check it to confirm and avoid wasting money while potentially damaging the engine. In the long run, you'll save a lot, especially when fuel prices rise. If you're in a hot climate or frequently carry heavy loads, there might be slight optimization, but the difference is minimal. Sticking to the basic octane rating is both safe and cost-effective.
