What do 92, 95, and 98 mean?

[JonathanLynn]

92 octane indicates that the actual gasoline's anti-knock performance is equivalent to a standard gasoline containing 92% isooctane and 8% n-heptane; 95 octane indicates that the actual gasoline's anti-knock performance is equivalent to a standard gasoline containing 95% isooctane and 5% n-heptane; 98 octane indicates that the actual gasoline's anti-knock performance is equivalent to a standard gasoline containing 98% isooctane and 2% n-heptane. Currently, the gasoline sold on the market mainly includes three types: 92 octane, 95 octane, and 98 octane. 92 octane gasoline is suitable for mid-range and low-end cars with lower quality requirements for gasoline; 95 octane gasoline is suitable for most cars, including those with turbocharging or high compression ratios; 98 octane gasoline has high requirements for the car's engine and is suitable for high-end luxury or high-performance vehicles. The higher the octane number, the better the gasoline's anti-knock performance. Gasoline with an octane rating above 95 gradually increases in octane content and is suitable for high-compression-ratio models. Naturally aspirated engines with a displacement below 2.0T generally have a compression ratio within 10 and can use 92 or 95 octane gasoline. For turbocharged models with a displacement of 1.5T or above, 95 octane or higher is recommended.

[MacBennett]

I've been driving for twenty years and know that numbers like 92, 95, and 98 are gasoline grades representing octane ratings. Simply put, the higher the number, the less likely the gasoline is to ignite prematurely in the engine, which is called good anti-knock performance. 92 gasoline has a lower octane rating, suitable for older cars or engines with low compression ratios, and is cheaper; 95 is mid-grade, recommended for most new cars today, balancing performance and cost; 98 is premium, with the highest octane rating, suitable for high-performance cars or turbocharged engines, running smoother but more expensive. I used to save money with 92, but after changing cars, I found 95 more stable, with better acceleration and slightly better fuel economy. Beginners shouldn't just go for the cheapest option; check the vehicle manual recommendations first to avoid misfueling, which can cause engine knocking or even damage. Long-term use of low-grade gasoline may lead to more carbon deposits. Remember, using the right fuel can extend your car's lifespan and save on maintenance costs.

[DelilahLee]

I've been driving for three years. 92, 95, and 98 are essentially different types of gasoline, with the numbers representing the octane rating. The higher the number, the more difficult it is to ignite prematurely. 92 is the cheapest and suitable for basic cars, such as some small-displacement models. 95 is the most common grade, working well for most family cars or SUVs, balancing cost and performance. 98 is a bit more premium, designed for luxury cars or sports cars with high-performance engines. I once tried using 92 to save money, saving a few dozen bucks a month, but the engine sometimes made a buzzing noise and lacked power. Switching to 95 made a big difference—smoother acceleration and less noise. Crunching the numbers, while 98 is better, it's a waste of money if your car doesn't support it. I recommend everyone follow their car's manual rather than just looking at the price. Using the wrong grade might increase fuel consumption or even damage sensors—safety first. Using the right gasoline also reduces emissions, protecting the environment, which is more cost-effective in the long run.

[RafaelLynn]

I usually pay attention to car safety. 92, 95, and 98 are the octane ratings of gasoline. Simply put, a higher number indicates more stable gasoline. 92 has a lower octane rating, which is acceptable for older cars or those with low compression ratios, but early ignition can cause knocking and make the car shake. 95 is in the middle, suitable for most regular cars, keeping the engine quiet. 98 is the highest, ideal for high-performance engines. Higher-octane fuel reduces the risk of knocking, protects internal engine components, and prevents overheating damage. My family only uses 95 when driving, fearing that 92 might cause issues affecting driving safety. Always choose reputable gas stations to ensure fuel quality—don’t go for cheap, lesser-known brands. If you accidentally use a lower octane, the engine warning light might come on, so it’s best to get it checked. Using the right fuel not only makes the car run better but also extends its lifespan and reduces maintenance hassles.