Gasoline label: it is the ratio of the antiknock performance of actual gasoline to that of standard gasoline. The higher the label, the stronger the explosion-proof performance. Standard gasoline consists of isooctane and n-heptane. The higher the level, the better. The brand of gasoline should be reasonably selected according to the compression ratio of the engine.
Additives: Gasoline contains riot additives, active additives, catalytic combustion improvers, adjustable flame retardants, cleaning additives and other additives. According to different grades of fuel, the proportion of each additive is also different. The anti-riot additive is octane, and the designated flame retardant also has anti-riot function. Therefore, the decrease of label does not mean the decrease of explosion-proof octane number, and the work of flame retardant needs to be adjusted. Million car purchase subsidy