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What is the difference between 98-octane and 95-octane gasoline?

2 Answers

McAriel

07/28/25 3:16pm

98-octane and 95-octane gasoline differences: 1. Different octane ratings: 98-octane gasoline is a mixture of 98% isooctane and 2% n-heptane; 95-octane gasoline consists of 95% isooctane and 3% n-heptane. 2. Different anti-knock combustion capabilities: 98-octane gasoline has higher anti-knock properties and power performance; 95-octane gasoline has average anti-knock combustion ability. Gasoline appears as a transparent, flammable liquid, refined from various petroleum-derived components such as straight-run gasoline, catalytic cracking gasoline, and catalytic reforming gasoline, blended with high-octane components. It is primarily used as fuel for spark-ignition internal combustion engines in automobiles.

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StDante

08/11/25 10:51pm

As an auto enthusiast, I've studied the difference between 98 and 95 octane gasoline - the key lies in octane rating variation. Higher octane fuel has better anti-knock properties, which is crucial for high-compression engines like sports cars or turbocharged vehicles. Using 98 octane can reduce abnormal combustion knock, preventing engine pinging and power loss. 95 octane suits regular family cars designed for lower compression ratios, offering better cost performance. Using higher octane fuel in vehicles not requiring it provides little benefit and may waste money. When test-driving high-performance cars, I noticed 98 octane delivers smoother, more powerful acceleration with steadier engine sound; but for daily commuting, 95 octane is more economical and worry-free. The owner's manual specifies recommended fuel grade - just follow that. Long-term misuse may cause engine wear or increased fuel consumption, which deserves attention.

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