Multi-point EFI: Should I Use 92 or 95 Octane?
3 Answers
Whether to use 92 or 95 octane gasoline for multi-point electronic fuel injection depends on the motorcycle's manual and the engine's compression ratio. Differences in composition: 92-octane gasoline consists of approximately 92% isooctane and 8% n-heptane, while 95-octane gasoline contains about 95% isooctane and 5% n-heptane. Isooctane has better anti-knock properties, whereas n-heptane has poorer anti-knock performance. Therefore, the higher the octane rating, the better the gasoline's anti-knock properties. Each engine undergoes comprehensive evaluation before leaving the factory, and based on performance characteristics, the required anti-knock level is determined, specifying which octane rating should be used. Differences in power: Higher-octane 95 gasoline is suitable for engines with higher compression ratios. As these engines increase in speed, the ignition timing advances. When the speed reaches a critical point, the air-fuel mixture may ignite prematurely before the spark plug fires, a phenomenon known as "knocking." Increasing the gasoline's octane rating effectively enhances its anti-knock performance.
I've been driving a multi-point fuel injection car for several years, always using 92-octane gasoline. 92-octane is affordable and practical. Multi-point fuel injection is an electronic fuel injection system that can precisely control fuel volume and isn't too demanding on fuel quality. I've tried 95-octane and didn't notice any significant changes in acceleration or power, but it cost me an extra hundred or so yuan per month on fuel. Unless your vehicle manual specifically requires 95-octane or your car's engine is a high-performance version, 92-octane is perfectly fine. However, make sure to use fuel from reputable gas stations to avoid impurities and carbon buildup. The advantage of multi-point fuel injection is that it's fuel-efficient and reliable. My average fuel consumption is around 8 liters per 100 kilometers, and after driving 100,000 kilometers, I haven't had any issues. I really don't see the need to upgrade to 95-octane unless you're someone who frequently speeds on highways. For daily commuting, 92-octane is more than enough—it's economical and safe. Don't forget to regularly maintain the fuel injectors.
As someone who prefers a dynamic driving experience, I use 95-octane gasoline for my multi-point fuel injection system. With higher octane and better anti-knock properties, 95-octane delivers smoother engine response and noticeably stronger acceleration thrust. Having driven a multi-point injection car for over two years, I observed a slight drop in fuel consumption after switching to 95-octane—though pricier per liter, it pays off long-term. Multi-point injection relies on ECU-controlled fueling, and 95-octane optimizes combustion while reducing abnormal vibrations. Of course, the owner’s manual is the baseline guide—some cars, like turbocharged models, may require 95-octane. My advice: if you want enhanced driving thrills or knock protection, choose 95-octane. Just avoid subpar fuel to prevent injector clogs. Bottom line: prioritize performance with 95-octane or save with 92—multi-point injection adapts well either way.
