The fuel tank cover of the car says that the use of unleaded gasoline above 93 is restricted. Can I add the current 92 # gasoline?

93 # gasoline is now 92 # gasoline, and it's no problem to add 92 # gasoline. No.93 is the national fourth standard, and No.92 is the new national fifth standard. Whether the label will be changed in the future is unknown.

No.92 gasoline is gasoline with octane number of 92 and n-heptane of 8, which is suitable for mid-range cars (low compression ratio). 2065438+On February 8, 2003, the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Administration jointly issued the fifth-stage national standard of motor gasoline (GB 17930-). Replace GB17930-2011).

"Motor Gasoline" (GB17930-2013) was jointly drafted and revised by China Petrochemical Technology Research Institute, China Petrochemical Technology Research Institute and China Automobile Technology Research Center. Previous versions were published as GB 17930— 1999 and GB 17938.

This revision not only considers the urgent requirements of air pollution prevention and air quality improvement in China at present and in the future, but also considers the present situation of production, storage, transportation and use of automobile gasoline products, as well as the technical transformation of oil production enterprises and the demand of automobile emission control technology.

The main indicators are equivalent to the current European standards, which meet the requirements of the fifth stage emission standards for domestic gasoline vehicles, help to reduce vehicle pollutant emissions, and have great significance for protecting the environment and improving air quality.

There is no problem using 97 gasoline for engines that use 93 gasoline. You can also mix and refuel, but only mix, not mix.

On the contrary, it is not good to add 93 # gasoline to a car that nominally uses 97 # gasoline. You can know the label of gasoline used by the car through the description on the tank cover.

Gasoline is a petrochemical product, whether it is No.93 or No.97, it is basically the same hydrocarbon, but the difference of some components leads to different explosion points. These different components are completely blended with base oil, and their physical and chemical indexes are the same. It's still gasoline after mixing.

Different gasoline labels correspond to different engines. The engine with high compression ratio can get more power by using high-grade gasoline. If low-grade gasoline is used, it will lead to premature combustion in the cylinder, destroy combustion conditions, knock the engine, reduce power, increase fuel consumption and produce carbon deposit. Engines with low compression ratio do not have this incompatibility with high-grade gasoline. It just doesn't give full play to the compression advantage of high-grade gasoline.

High-grade gasoline does not mean cleaner, nor does it have special cleaning ability. The driver only needs to refuel according to the label of the vehicle. However, there is no harm in mixing higher grade gasoline under special circumstances.