In view of these problems, PetroChina today carried out science popularization in its official micro blog. Can 92, 95 and 98 be mixed? Let’s start with the engine. < / P > < p > for the engine with different compression ratio, the fuel label selection is different. The engine with high compression ratio should choose high-grade gasoline as far as possible, while the gasoline label of low compression ratio engine can be appropriately reduced. No.92 and No.95 and No.98 gasoline are the same in terms of oil quality and cleanliness, and the biggest difference lies in their octane number. It is also designed to adapt to the different requirements of different compression ratio engines for anti shock value. < / P > < p > if the low-grade gasoline vehicle is mixed with high-grade gasoline, the short-term use will not cause too much impact on the engine, but if the long-term addition, blind pursuit of high-grade gasoline, its high antiknock function will not be able to play out, and there will be a phenomenon of flame retardation. The ultimate result of this phenomenon is that the combustion is not sufficient, the carbon deposition in the car increases, and environmental pollution is caused And waste of resources. < / P > < p > it is worth mentioning that it is dangerous not to refuel across labels. If the car was originally burning No. 92 gasoline, adding No. 98, it would not be advisable. For a long time, it would damage the engine and even directly lead to the car lying prone. < / P > < p > If a high-grade gasoline vehicle is mixed with low-grade gasoline, it is likely that the antiknock performance will be insufficient, and the failure rate of the engine will increase when the engine is working, and fuel consumption will increase, carbon deposition will increase, and the fuel injection nozzle will be blocked. Apple extends AppleCare + purchase period: users can decide within 60 days