Which is More Fuel-Efficient, 92 or 95?
2 Answers
Generally, 95-octane gasoline is more fuel-efficient than 92-octane gasoline, as it has better anti-knock properties. Below is relevant information about gasoline: 1. Classification Standard: In China, gasoline is produced and sold based on its octane rating. According to quality standards, gasoline grades are classified by their octane value. 2. Key Characteristics: The important properties of gasoline include volatility, stability, anti-knock performance, corrosiveness, and cleanliness. (1) Volatility: Gasoline must rapidly vaporize and form a uniform combustible mixture with air in the engine cylinder, which is primarily determined by its own volatility. (2) Stability: The ability of gasoline to resist oxidation under normal temperature and liquid-phase conditions is called its oxidation stability, or simply stability. (3) Anti-knock Performance: The property that measures whether a fuel is prone to knocking is called anti-knock performance, which is indicated by the octane number (RON). (4) Corrosiveness: The corrosiveness of gasoline is related to sulfur and sulfur compounds, organic acids, water-soluble acids, or bases. (5) Cleanliness: Gasoline often contains mechanical impurities and water.
I've driven several cars and specifically tested the fuel consumption of 92 and 95 octane gasoline. In reality, the mileage difference between the two isn't significant. 92 octane is cheaper but might consume slightly more fuel, while 95 octane is more expensive but keeps the engine running more smoothly. I remember once on a long trip using 95 octane, the same 50 liters got me about 30 kilometers more than with 92 octane. However, this varies greatly depending on the car—my old Toyota actually runs more economically on 92 octane. The key to choosing lies in your car's compression ratio; just follow the recommended octane number listed on the fuel cap. Don't believe claims that higher octane means longer burn—what the manufacturer recommends is what's best for your car.
