What type of fuel should be used for a motorcycle with a compression ratio of 11:1?
2 Answers
Motorcycle engines with a compression ratio of 11:1 should use 98-octane gasoline. High-compression engines are relatively more prone to knocking and require gasoline with better anti-knock properties. Below is a detailed introduction to 98-octane gasoline: Overview: 98-octane gasoline refers to gasoline whose octane rating is equivalent to a mixture of 98% isooctane and 2% n-heptane. The advantages of 98-octane gasoline are "two highs and two lows," meaning higher anti-knock performance and power output, while harmful substances in the gasoline and exhaust pollution are lower. Advantages: Compared to other octane grades, the advantages of 98-octane gasoline are mainly reflected in the "two highs and two lows": higher anti-knock performance and power output, with reduced harmful substances and exhaust pollution. Using higher-octane gasoline allows for greater engine power and smaller displacement, improving both performance and fuel economy.
When the motorcycle's compression ratio is 11:1, I recommend using high-octane gasoline such as 95 or 98, because the higher the compression ratio, the more prone the engine is to knocking. Regular fuel can cause irregular combustion, damaging the piston. I once rode a motorcycle with a compression ratio of 11, and after using 92-octane fuel, I heard a 'clicking' sound when climbing hills. The mechanic said it was a knocking warning. After switching to 95-octane, it ran much smoother. It's even more dangerous at high temperatures; in summer when it's above 30°C, low-octane fuel burns unevenly. Regular spark plug checks and maintenance can prevent issues, but the key is using the right fuel to extend engine life.
