What are the indicators of gasoline?

[DeLuke]

Gasoline's main indicators include octane number, gum content, distillation range, vapor pressure, sulfur content, etc. 1. Volatility: Refers to the ease with which gasoline evaporates in the carburetor. It has a significant impact on engine starting, warm-up, acceleration, vapor lock, and fuel consumption. The volatility of gasoline is comprehensively evaluated by three indicators: distillation range, vapor pressure, and vapor-liquid ratio. 2. Anti-knock performance: Refers to the ability of gasoline to resist detonation combustion under various operating conditions. The anti-knock performance of automotive gasoline is expressed by the octane number. The higher the octane number, the better the anti-knock performance. The anti-knock capability of gasoline is related to its chemical composition. 3. Stability: Refers to the stability of gasoline when stored for a long time under natural conditions. It is characterized by gum content, induction period, and iodine value. The lower the gum content, the better; the longer the induction period, the better. National standards stipulate that the actual gum content per 100 milliliters of gasoline must not exceed 5 milligrams. The iodine value indicates the content of olefins.