Fuel composition containing quaternary ammonium salts of succinimides

A motor fuel composition comprising a mixture of hydrocarbons in the gasoline boiling range containing an effective detergent amount of a quaternary ammonium salt of a succinimide represented by the formula:

• ##STR4## in which R is a hydrocarbon radical having a molecular weight ranging from about 280 to 1800, R' is a divalent hydrocarbon radical having from 2 to 10 carbon atoms, R" and R"' are hydrocarbon radicals having from 1 to 6 carbon atoms or are interconnected to form a heterocyclic ring consisting of from 3 to 6 atoms selected from the group consisting of carbon, nitrogen and oxygen atoms, R"" is a hydrocarbon radical having from 1 to 6 carbon atoms, and X is the anion of an acid selected from the group consisting of halides, carboxylates and sulfonates.