Can 95 and 98 gasoline be mixed, Zhihu?

If you want to know whether the two kinds of gasoline can be mixed, you must first understand the meaning of gasoline label: 95 and 98 gasoline, that is, the octane number of gasoline is ≥95 and 98 respectively, which is clearly stipulated in the national V gasoline standard. But how did 95 and 98 come from? This is caused by different gasoline components. Now you ask Baidu this question, you will say no, but you won't elaborate on why.

I will try to analyze the composition of gasoline. If it is not accurate, experts will not laugh.

At present, China's gasoline depot is mainly composed of FCC gasoline, reformed gasoline, isomerization, aromatization, alkylated gasoline, MTBE and naphtha. Gasoline manufacturers are basically the same, with octane numbers of 90-9 1, 102- 104, 84-92 and 92-94 respectively. As a high-octane component, MTBE can generally be transferred to 13%. If the oxygen content of gasoline exceeds the national standard upper limit of 2.7%, MTBE will be further reduced if etherified gasoline is used as blending component. Catalytic gasoline is rich in olefins, reforming and aromatization are rich in aromatics, so there is a maximum sum to meet the national standards. To put it bluntly, it is a number game. Thus, in China, the higher the gasoline label, the higher the aromatic content, and the higher the general gasoline density, while the lower the label, the higher the olefin content, and the worse the stability, not to mention Sinopec. At the same time, the analysis error of octane number is also relatively large. For the same oil, the difference between different laboratory samples can be 0.5, but the profit gap between the two oils is huge, so you can understand why they are all promoting not to mix.

So whether it can be mixed or not is not determined by the oil. In terms of composition, there is no problem, especially 95he98. The result of mixed addition is that the oil composition is more reasonable, but the octane number should be determined according to the mixing ratio.

When the engine oil is finished, let's talk about the vehicle. If your car is not bad and you are not a racing driver, there is no problem, not to mention the ignition system. Mysterious b, people still eat whole grains, which is more accurate than people.

Of course, the most important thing I can decide is whether to mix. Who is bored enough to queue up at this gas station for half a day to add 15 liters, and then add 20 liters at another place? Everyone is busy with time, so stop fooling around.