What does gasoline 92 and 95 mean?

[McKeira]

92 gasoline refers to gasoline with an octane rating of 92, while 95 gasoline consists of 95% isooctane and 5% n-heptane. Understanding gasoline grades: The main difference between different gasoline grades lies in their anti-knock performance, which is an important indicator for measuring fuel quality. 92 gasoline is suitable for mid-range vehicles (with lower compression ratios), while 95 gasoline, composed of 95% isooctane and 5% n-heptane, is recommended for engines with higher compression ratios. 98 gasoline has an octane rating equivalent to a mixture of 98% isooctane and 2% n-heptane. The advantages of 98 gasoline are "two highs and two lows": higher anti-knock performance and power output, along with lower harmful substances in the gasoline and reduced exhaust pollution. Precautions for refueling: Do not switch gasoline grades arbitrarily. Switching to a lower grade may cause premature combustion, leading to engine knocking. Incomplete combustion can also increase carbon deposits, clogging ducts and injectors, resulting in reduced vehicle power and increased fuel consumption.

[DiCassidy]

92 and 95 gasoline refer to octane ratings, where the numbers indicate the fuel's anti-knock performance. 92 has ordinary anti-knock properties and is suitable for most small or economy cars with low compression ratios. It's cheaper to use, and from my experience driving family cars, sticking with 92 can save a lot on fuel costs. However, it's essential to check the vehicle manual, as some models like older sedans only recommend this grade. Using 95 unnecessarily could waste money and affect exhaust emissions. When fuel prices fluctuate, choosing 92 is more economical. If the engine has a low compression ratio, using higher-grade fuel offers no benefit. It's best to regularly inspect the fuel system during maintenance to prevent issues.

[DelAaliyah]

Gasoline grades 92 and 95 represent octane ratings, meaning the higher the number, the more resistant the fuel is to high-temperature knocking. Grade 95 has better anti-knock properties and is used in high-end cars or high-compression engines to improve smooth power delivery. As someone who frequently modifies cars, I've found that 95-grade fuel reduces engine knocking sounds, which resemble metal clanging and can damage critical engine components—always check the fuel cap label for the recommended grade. Although 95 is more expensive, it's more efficient and may be better suited for new cars or SUVs. Before refueling, check the fuel gauge to avoid mixing different types, as this can affect emissions and fuel consumption. Remember, higher numbers aren't always better—don't randomly use 98-grade unless specified for your vehicle.

[LaLaila]

92 and 95 are fuel octane ratings, with higher numbers indicating better fuel quality; 92 is cheaper and commonly used in regular cars without issues, while 95 is suitable for high-performance vehicles with better anti-knock properties; When I first started driving, I was told to use 92 to save money and hassle, but it's essential to check the manual or fuel cap label to avoid using the wrong type, otherwise, the engine might knock and cause problems; For beginners, checking the label is simple and practical, and if you occasionally use the wrong fuel, don't panic—just replace it promptly and maintain the engine properly, no need to stress too much.