What are the hazards of frequently using 95 gasoline in a car designed for 92?
2 Answers
For a car that should use 92 gasoline, using 95 gasoline generally has little impact. However, using a higher octane fuel won't increase power and is somewhat wasteful, as the engine's compression ratio doesn't meet the required standard. The anti-knock performance will certainly be better than before, naturally preventing knocking, but it basically won't affect fuel consumption. Below are the relevant details: The primary function of gasoline octane ratings: It indicates anti-knock performance and has no relation to the quality of the gasoline itself. It doesn't mean that higher octane gasoline has fewer impurities. In fuel, the anti-knock substance is isooctane. 92 gasoline: Contains 93% isooctane. The higher the octane rating, the better the combustion stability, preventing the engine from operating abnormally due to knocking. This is why engines designed for 95 gasoline must never use 92 gasoline, as it can cause damage to the engine.
I'm the frugal type who usually drives a car that takes 92-octane fuel. Once, a colleague persuaded me to try 95-octane gasoline, claiming it could extend engine life. After using it for a few months, my fuel expenses increased by nearly 100 yuan per month, and the car didn't feel any better to drive. In fact, I occasionally noticed slight shaking when driving on the highway. After some research, I learned that using 95-octane in a car designed for 92-octane slows down ignition, leading to incomplete combustion and carbon buildup in the cylinders. Over time, this can clog components and require costly repairs. Economically speaking, it's just wasted money. If I kept doing this, the car might develop minor issues prematurely, like difficulty starting or abnormal fuel consumption. So now, I stick to the recommended 92-octane fuel—it saves money and hassle. Why create unnecessary trouble for myself?
