No. 92 cars can be filled with No. 95 oil.
However, long-term use will cause damage to the car, so it is best to refill it according to the manufacturer's recommended markings. Gasoline is a mixture, and the gasoline labels you usually come into contact with refer to the different anti-knock indexes (octane numbers) of gasoline. Strictly speaking, 92# gasoline and 95# gasoline cannot be mixed.
If low-grade gasoline is mixed with high-grade gasoline, it will cause knocking, lack of power, etc., and will affect the service life of the spark plug, and will also bring more exhaust pollution. It is not that high-grade gasoline will make the power stronger. The higher the grade of gasoline, the higher the octane number, which means the anti-knock performance of the gasoline is better. In fact, the grade of gasoline has nothing to do with whether the fuel is clean.
The development history of gasoline:
In the 19th century, people had not yet realized the importance of gasoline. At that time, kerosene was used in large quantities for lighting. Petroleum refining at that time relied on a simple distillation process to separate components with different boiling points in the petroleum. The kerosene component has a higher boiling point and is safe to use when lighting lamps. It has become the main product of crude oil refining, while gasoline and other components are often burned as fuel.
In the mid-to-late 19th century, an internal combustion engine using gasoline was successfully created. In 1886, the gasoline engine was successfully used as a power source for automobiles. Since then, the importance of gasoline has increased day by day. However, using distillation, only 20% of gasoline can be extracted from crude oil.
In 1911, the American Standard Oil Company solved the problem of low gasoline yield and used the thermal cracking process invented by William Burton and Robert Humphreys to heat heavy gas oil. It is cracked into light gasoline and other fractions, thus increasing the overall gasoline yield. The thermal cracking process was granted a U.S. patent in 1913.
The subsequent catalytic cracking process further improves the gasoline yield and has a higher octane number than the thermal cracking process.