What does it mean to add 92 or 95?

[AaliyahDella]

Adding 92 or 95 refers to filling up with 92-octane or 95-octane gasoline. The differences between 92-octane and 95-octane gasoline are as follows: 1. Different ratios of n-heptane and isooctane: The main difference between 92-octane and 95-octane gasoline lies in the ratio of n-heptane to isooctane. Different gasoline octane ratings indicate different anti-knock properties. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. 2. Different engine compression ratios: Using 92-octane or 95-octane gasoline affects the engine's compression ratio, and the combustion speeds of the two types of gasoline also differ. The higher the octane rating, the slower the combustion speed, resulting in better anti-knock performance, which requires a higher engine compression ratio. If lower-octane fuel is used, the combustion speed is faster, the anti-knock performance is poorer, and the engine's compression ratio will decrease, causing the gasoline to burn more quickly.

[DianaFitz]

Numbers like 92 and 95 refer to gasoline grades, such as 92-octane and 95-octane gasoline, indicating the octane rating level of the fuel. 92 represents a lower octane value, which is cheaper and suitable for most ordinary sedans; 95 has a higher octane value, better anti-knock performance, and is less prone to knocking under high temperatures, making it suitable for vehicles with higher compression ratios or turbocharged engines. Having driven many models, I've found that if the car manual recommends 92 but you use 95, not only is it a waste of money, but it may also lead to incomplete combustion, increased fuel consumption, and higher emissions. Conversely, using 92-octane fuel in a high-performance car may cause engine knocking or piston damage. When refueling, it's advisable to check the vehicle's requirements first—don't blindly follow trends, as higher grades aren't always better. Additionally, using lower-grade fuel in congested urban areas can save on fuel costs and be more environmentally friendly. This habit has helped me save a lot of expenses and reduced maintenance frequency. In short, understanding your car is more reliable than randomly choosing fuel grades—it protects the engine, saves hassle, and cuts costs.

[DaniellaLee]

92 and 95 are gasoline octane ratings, indicating anti-knock performance levels. 92-octane has lower octane value and is commonly used for daily economy cars due to its affordability; 95-octane has higher octane value, making it more suitable for high-compression engines like SUVs or sports cars to prevent engine knocking issues. After years in auto repair, I've seen many car owners mistakenly believe higher octane means premium quality, only to spend extra without performance gains. If your vehicle requires 92 but you insist on using 95, incomplete combustion may increase carbon deposits and even affect the fuel injection system. Conversely, using 92 in a 95-required car may cause engine knocking sounds and potentially damage components. Always check your owner's manual – most family cars perform perfectly with 92-octane, no need for waste. Also, pay attention to gas station labels to avoid mix-ups, as proper octane selection impacts engine durability. Long-term correct choices can extend engine life, and developing this habit helps avoid unnecessary repair costs.

[MarianaAnn]

Numbers like 92 and 95 are the grade ratings of gasoline, where a higher number indicates greater stability and less likelihood of premature combustion in the engine. For regular cars, such as my old sedan, using 92-octane is quite cost-effective—it's cheaper per liter and more economical for daily city commutes. On the other hand, 95-octane is better suited for new cars or high-performance engines, as it may provide smoother acceleration, albeit at a higher cost. With over a decade of driving experience, I've learned that one shouldn't arbitrarily choose the octane rating. It's essential to follow the manufacturer's recommendations to avoid engine issues or increased fuel consumption. Regularly checking the manual and fueling appropriately is far better than making random choices—it protects the car and saves money in the long run.