What do 95 and 98 mean?

[LaSadie]

95 and 98 are both gasoline grades. Here are the detailed explanations: 1. The meaning of gasoline grades: 92#: Gasoline with an octane rating of 92% and a heptane rating of 8%. 95#: Gasoline with an octane rating of 95% and a heptane rating of 5%. 98#: Gasoline with an octane rating of 98% and a heptane rating of 2%. 2. The difference in gasoline octane ratings: The higher the octane rating of gasoline, the better its anti-knock performance. Anti-knock performance refers to the ability of gasoline to resist knocking when burned in the engine. When refueling, different grades of gasoline should be selected based on the engine's compression ratio (the ratio of the maximum volume of the cylinder at bottom dead center to the minimum volume at top dead center).

[HarrisonAnn]

Every time I go to the gas station and see the labels for 95 and 98 octane gasoline, I'm reminded that their primary difference lies in their octane ratings, which represent the fuel's anti-knock performance. 95 octane has a lower rating and is suitable for most sedans—like my family car that runs perfectly fine on 95 without engine knocking issues, plus it's relatively cheaper. On the other hand, 98 octane, with its higher rating, is better suited for high-performance or sports cars, ensuring smoother engine operation and improved power output. However, using 98 in a regular car just wastes money without real benefits. Nowadays, many people casually mix fuels for convenience, but it's crucial to check the vehicle manual first—it clearly specifies the recommended octane. Using the wrong grade long-term may lead to increased carbon deposits or higher fuel consumption. When choosing fuel, consider your daily driving habits rather than blindly opting for higher octane.

[KendraDella]

With 20 years of driving experience, the difference between 95 and 98 is straightforward: higher numbers mean more resilient fuel. 95-octane is sufficient for regular driving, providing smooth operation without harming the engine; 98-octane suits high-performance vehicles, offering stronger power but at a higher cost. Always consult your car's manual before choosing—don't decide on your own. Using the wrong fuel may cause minor issues like unstable idling, so regular checks ensure the best match.

[VonLena]

As a car owner, I've asked this question. 95 and 98 are gasoline grades, corresponding to different octane ratings. Regular cars can use 95, while 98 is more suitable for high-end vehicles. Using the wrong grade may cost more money unnecessarily, so it's best to follow the manual.