Amine derivatives of hydrocarbyl lactam carboxylic acids as fuel additives

Claim 1

A motor fuel composition comprising a mixture of hydrocarbons in the gasoline boiling range and an additive mixture including, in a concentration of from 0.001 to 0.1 weight percent, a substituted butyrolactam of the formula: ##STR5## wherein R is a hydrocarbyl radical of from 1 to 12 carbon atoms, an N-mono- or N,N-di-hydrocarbyl substituted aminoalkyl radical wherein each hydrocarbyl moiety and said alkyl moiety contains from 1 to 12 carbon atoms, or an N-butyrolactam alkyl radical containing the substituents R 1 , R 2 and R 3 and wherein said alkyl moiety contains from 1 to 12 carbon atoms; R 1 is a hydrocarbon radical of from 1 to 20 carbon atoms; each of R 2 and R 3 is a hydrogen atom or a hydrocarbyl radical of from 1 to 500 carbon atoms, provided that only one of R 2 and R 3 is hydrogen; and only one of R 2 and R 3 is hydrocarbyl; each of R 4 and R 5 is hydrogen or a hydrocarbyl radical of from 1 to 25 carbon atoms; R 6 is a hydrocarbyl radical of from 1 to 25 carbon atoms or an amino alkyl or poly (azaalkyl) radical; n has a value of 0 to 1 inclusive; and each of said hydrocarbyl substituents is unsubstituted or substituted.