The kinetic features of the deposition of gums formed during long-term storage of diesel fuel in tanks were studied. A kinetic equation for the calculation of the gum formation rate was proposed. The rate constant and the order of the reaction were calculated. It was found that the gum formation process is accompanied by self-retardation and the gums produced inhibit oxidation reactions, a fact that is corroborated by a negative value of the rate order for the gum formation reaction, which is minus 2. The calculated values of gum concentration in diesel fuel correlates well with the values obtained experimentally.