Gasolines are taken care of with metallic deactivators, which are compounds that sequester (deactivate) steel salts that usually speed up the development of gummy residues. The metallic impurities might crop up from the engine alone or as contaminants inside the fuel. Detergents[edit] This is usually generally known as engine knocking https://marioevkym.hyperionwiki.com/577821/gasoline_alley_harley_an_overview