What's the best number of Honda Accord 2.0 gasoline?

Gasoline is produced and sold according to the brand, and the brand specifications are stipulated by the national gasoline product standards and related to different standards. At present, there are three gasoline brands (Ⅳ) in China, namely 90, 93 and 97. Countries (V) are No.89, No.92 and No.95 (No.98 is included in the appendix). The grade of gasoline is divided according to the octane number.

For example, 97 # gasoline refers to gasoline fuel with antiknock performance equivalent to 97% isooctane and 3% n-heptane. The bigger the label, the better the explosion-proof performance.

Different brands of gasoline should be selected according to the engine compression ratio, which will be indicated in the user manual of each car. Generally, mid-range cars with a compression ratio of 8.5-9.5 should use No.90 (national IV) gasoline, and cars with a compression ratio greater than 9.5 should use No.93 (national IV) gasoline.

Extended data:

93 # oil is 5% more expensive than 90 # oil, but it also consumes about 5% less energy. Compared with the fuel consumption of 100 kilometers, it is equal in theory. However, when 90 # oil is used in a high compression ratio engine matched with 93 # oil, secondary combustion and incomplete combustion will occur, resulting in an additional power loss of 5%-8%. Then, considering a series of consequences such as increased maintenance cost, reduced vehicle condition and shortened service life, the cost of standard engine oil will be reduced.

Gasoline is an extremely volatile liquid, and the combustible components are still volatile at MINUS 30 degrees Celsius. If the gasoline label is too low, the compressed mixed oil and gas will spontaneously ignite before ignition. When igniting, the oil and gas that has started to spontaneously ignite will produce a strong explosion, which will make the originally accurately designed combustion program out of control. Some gasoline has done negative work, and some gasoline can't burn completely because the combustion process is not synchronized with the piston stroke, which leads to serious carbon deposition in the intake valve and cylinder, increased fuel consumption and bad exhaust gas.

Baidu encyclopedia-No.93 gasoline