What grade of fuel should a Harley 883 use?
1 Answers
Harley 883 uses 93 octane fuel. Reasons for using 93 octane fuel: 97 octane gasoline refers to a fuel with anti-knock performance equivalent to a mixture of 97% isooctane and 3% n-heptane. The higher the octane number, the better the anti-knock performance. Different grades of gasoline should be selected based on the engine's compression ratio, which is specified in each vehicle's manual. Mid-range cars with a compression ratio between 8.5 and 9.5 generally should use 90 octane (China IV) gasoline, while cars with a compression ratio greater than 9.5 should use 93 octane (China IV) gasoline. Additional notes: If a high-compression engine uses low-octane fuel, it can cause a sharp rise in cylinder temperature, incomplete combustion of the fuel, severe engine vibration, leading to reduced power output, damage to engine components, increased fuel consumption, and poor driving performance. Conversely, if a low-compression engine uses high-octane fuel, it can result in "delayed ignition," where the fuel does not reach its auto-ignition point even at maximum compression, leading to incomplete combustion, which is also not beneficial for the engine.