Should the Honda PCX 125 use 92 or 95 octane gasoline?
2 Answers
Honda PCX scooter is suitable for using 95 octane gasoline, with an engine compression ratio of 9.8:1. Differences between 92 and 95 gasoline: The main difference lies in the varying proportions of n-heptane and isooctane. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. Gasoline octane ratings: Indicate the fuel's octane number. Higher ratings mean higher octane values, representing better anti-knock performance. 95 octane gasoline has superior anti-knock properties compared to 92 octane. Stronger anti-knock performance makes engine starting easier, ensures smoother idling, faster acceleration, reduced knocking, and provides more powerful engine performance.
I'm the owner of a Honda PCX125 and have been commuting with it for two to three years, usually filling it with 92-octane gasoline. The engine's compression ratio is around 10:1, designed specifically for low-octane fuel, so 92-octane is a perfect match—smooth and fuel-efficient. 95-octane is much more expensive, costing over a dollar more per liter. The savings from using 92-octane for a year could cover the cost of a new tire. Plus, higher-octane fuel may not burn completely in engines with lower compression ratios, potentially reducing power and increasing fuel consumption. I recommend checking the owner's manual—the manufacturer clearly recommends 92-octane or higher, but 92 is sufficient. Saving money while being practical—why not? Isn’t riding a motorcycle all about affordability and convenience?
