Regarding 93-octane high-performance gasoline and 93-octane automotive gasoline

Gasoline with octane rating 93 is definitely below the National IV standard, as under the National V standard, the octane rating for this grade has been changed to 92. The main reason for this is the change in the composition of olefins; currently, most hydrogenation units result in a loss of octane value, with the greater the degree of hydrogenation, the more significant the loss of octane value. Therefore, **along with the implementation of the National V clean air standards, the requirements regarding octane value have been reduced. The concept of “high-cleanliness 93-grade gasoline” and “93-grade automotive gasoline” mentioned by the original poster is rather vague – just like the terms “environmental protection” and “secondary wastewater discharge standards”: one is a general term, while the other comes with specific regulations and standards. In the petrochemical industry, “high-cleanliness” refers to the idea of no pollution during use and the possibility of recycling. National V gasoline is certainly cleaner than National IV gasoline, as its sulfur content and olefin content are lower, which reduces pollution. In short, although some criteria related to “high-cleanliness 93-grade gasoline” may not meet the National IV standard, its sulfur content and other key pollution indicators are definitely higher than those specified by National IV standards