What type of fuel should be used for motorcycles with a compression ratio greater than 11?
2 Answers
You can use 97-octane gasoline. Engine compression ratio: Generally speaking, the higher the compression ratio of an engine, the smaller the volume of the combustible mixture being compressed, resulting in greater power and lower fuel consumption. However, the engine's compression ratio must be matched with another indicator, which is the gasoline's anti-knock index, also known as the octane number, or the gasoline grade. Types of fuel: Currently, the fuel market abroad offers gasoline in three grades: 93, 95, and 98. Engine compression ratios are also designed with reference to these three grades, so there are not many engines that are compatible with 90-octane gasoline.
I've been riding motorcycles for over a decade. When the compression ratio exceeds 11:1, you must use higher-octane gasoline, such as 95 or 98 octane. High-compression engines generate extremely high temperatures and pressures during compression, and using low-octane fuel can easily cause knocking, which sounds like metal pinging, and over time can damage pistons and cylinders. In my own experience, sticking to premium fuel improves engine efficiency, delivering more power and better fuel economy. Especially during summer or long-distance rides, when temperatures rise and the risk of knocking increases, I always check the manual for the recommended fuel grade. One lesson from mistakenly using 92 octane fuel is etched in my memory: saving a little money isn't worth a major overhaul, and regular maintenance can extend your motorcycle's lifespan.
