What do 92, 95, and 98 mean?
2 Answers
92, 95, and 98 represent these three grades of gasoline. 92-octane gasoline is suitable for vehicles with mature engine technology and no excessive fuel requirements; 95-octane gasoline is generally suitable for turbocharged and high-compression ratio vehicles, and it is compatible with the vast majority of models on the market; 98-octane gasoline is suitable for high-horsepower sports cars. The differences between 92, 95, and 98 gasoline: Different gasoline quality levels: The octane rating of gasoline represents the octane value of the fuel. A higher octane rating indicates a higher octane value, which means the gasoline has better anti-knock performance. This results in smoother engine operation, reduced wear and tear on the car, and better protection for the engine. Different fuel consumption: 98-octane gasoline has superior combustion value, allowing for more complete combustion and improved fuel efficiency, which helps reduce fuel consumption. Different environmental benefits: 98-octane gasoline is more environmentally friendly. It contains lower sulfur levels, reducing the likelihood of carbon deposits and resulting in relatively lower tailpipe emissions, making it more eco-friendly. It is recommended that vehicles designed for lower octane gasoline will not be damaged if higher octane gasoline is accidentally used. However, the increase in octane value may alter the fuel's ignition point, leading to delayed combustion in the engine. This can reduce the engine's power output and thermal efficiency, resulting in poorer performance. It is recommended that vehicles designed for higher octane gasoline should not use lower octane gasoline, as this can cause engine knocking. If the octane value is too low, the gasoline's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance will be encountered during the upward stroke. This resistance can make the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but severe knocking indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring. If you accidentally mix or add the wrong octane gasoline, simply refuel with the correct octane gasoline next time to restore normal operation. Some car owners believe that using higher octane gasoline can improve performance, but this is unnecessary. If the engine's compression ratio does not meet the required standard, even the best gasoline will not make a difference. At most, it may be slightly more environmentally friendly and cleaner.
When I first started driving, I was also confused about these numbers 92, 95, and 98. These numbers actually indicate the types of gasoline, representing the octane rating. The higher the octane rating, the better the gasoline's anti-knock performance. Simply put, if your car is a regular model, using 92 is fine; but if it's a high-end or high-performance car, it might be recommended to use 95 or 98, as this ensures more stable combustion in the engine, reducing strange noises or vibrations. I once used the wrong fuel, and the car felt uncomfortable when accelerating. Later, I checked the manual and realized the issue. Remember, always refer to your car’s manual when choosing the fuel grade—don’t just guess. Also, different gas station brands might have slight differences in fuel quality, so try to fill up at reputable stations. Protecting your engine is important, but avoiding costly repairs is even more crucial. Pay attention to the label on your fuel cap, and during regular maintenance, ask the technician to check the spark plugs—this can save you a lot of trouble.
