What is the difference between 95 and 92 gasoline?
2 Answers
The difference between 95 and 92 gasoline lies in their octane ratings: 95 gasoline consists of 95% isooctane and 3% n-heptane, while 92 gasoline consists of 92% octane and 8% n-heptane. Different grades of gasoline have different octane ratings, with higher grades indicating higher octane values. Gasoline with higher octane ratings has better anti-knock properties. These two types of gasoline should not be mixed, as it can lead to the accumulation of excessive combustion residues. Over time, this can cause the engine to accumulate a significant amount of carbon deposits, affecting its power, increasing fuel consumption, and impairing normal engine operation. Gasoline is a transparent, flammable liquid obtained from refining petroleum, including straight-run gasoline components, catalytic cracking gasoline components, and catalytic reforming gasoline components. After refining, it is blended with high-octane components and is primarily used as fuel for spark-ignition internal combustion engines in automobiles.
I usually like to study fuel quality when driving. The biggest difference between 95 and 92 gasoline lies in the octane number, which is the anti-knock index. 95-octane has a higher octane value, making it suitable for high-compression engines like turbocharged cars. It burns more stably to prevent knocking, making acceleration feel more powerful and the engine quieter. For regular family cars with low compression ratios, 92-octane is sufficient—it's cheaper and saves money. Using higher-octane fuel unnecessarily is a waste of money with no extra benefits, while lower-octane fuel in high-compression engines may damage the engine. From my own experience, always stick to the fuel grade recommended in the car manual—don’t fall for ads claiming that 95-octane cleans fuel lines or anything like that.
