What does 92, 95, 98 mean?
1 Answers
92, 95, and 98 refer to 92-octane gasoline, 95-octane gasoline, and 98-octane gasoline. Understanding gasoline grades: The biggest difference between different grades of gasoline lies in their anti-knock performance, which is an important indicator for measuring fuel quality. 92-octane gasoline has an octane rating of 92 and is suitable for mid-range vehicles (with lower compression ratios). 95-octane gasoline consists of 95% isooctane and 5% n-heptane, and should be used in engines with higher compression ratios. 98-octane gasoline has an octane rating equivalent to a mixture of 98% isooctane and 2% n-heptane. The advantages of 98-octane gasoline are 'two highs and two lows': higher anti-knock performance and power output, and lower harmful substances and exhaust pollution. Effects of long-term use of incorrect gasoline grades: Using a higher octane gasoline in a vehicle designed for lower octane will not cause damage, but the increased octane rating can alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power and thermal efficiency. Conversely, using lower octane gasoline in a vehicle designed for higher octane can cause engine knocking, increased resistance during the power stroke, abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.
