Gasoline gum problem

Actual gum is an important indicator for assessing the stability of gasoline, determining its tendency to form gum in engines, and deciding whether the gasoline can be used or continued to be stored. **The standard specifies that the actual gum content in every 100 milliliters of gasoline must not exceed 5 milligrams. . Why is the concept of actual gelatin needed? Whether it is 90#, 93#, or 97#, they all contain a certain amount of olefins; at room temperature these olefins precipitate and form a gel. This gel then carbonizes at high temperatures, resulting in carbon deposits (of course, the formation of carbon deposits is not caused by just one factor). Another scenario is that gelation at room temperature can clog the fuel injectors, resulting in poor atomization; this prevents proper combustion and leads to carbon buildup). The national standard method for determining gum content is GB/T8019

What was said on the second floor is correct: the national standard method for determining gum content is GB/T8019-2008. Before the actual gum content, there is also the gum content after washing; generally, the national standard uses the gum content after washing as the reference value. This refers to the gum content of the oil that has been distilled under certain temperature, pressure, and time conditions, and then the gum content after washing with n-heptane is taken as the actual gum content according to the standard. There is a significant difference between the gum content before washing and the gum content after washing