What is the difference between 97 and 98 gasoline?

[DiZoey]

98 gasoline mainly differs from 97 gasoline in terms of anti-knock performance. Its anti-knock performance (RON) is one octane unit higher than 97 gasoline. Increasing the octane value of 97 unleaded gasoline by one unit requires greater technical difficulty and higher processing costs. The higher the grade, the stronger the anti-knock performance. The following is a related introduction about engine oil: Function of engine oil: Engine oil can lubricate and reduce wear, assist in cooling, seal and prevent leakage, prevent rust and corrosion, and dampen vibration for the engine. It is known as the "blood" of the car. Choosing the right engine oil and changing it regularly can maintain the engine in good condition and extend its service life. Selection of engine oil: The choice of engine oil is not about choosing the most expensive one, but about selecting the right engine oil based on the characteristics of the car engine and usual driving habits. Engine oil can be classified according to winter use and summer use. Engine oil suitable for winter use should first consider the low-temperature viscosity grade. In summer, the temperature is high, so there is no need to choose engine oil with a better low-temperature viscosity grade.