The use of compounds selected from the group consisting of and formula in which R is a divalent organic radical, preferably an alkylene radical having 2 to 10 carbon atoms, R 1, R 2, R 3, R 4, R 5 and R 6 are independently hydrogen or a monovalent organic radical or a -[-X i -] n -H radical or R 1 and R 2 collectively and together with the nitrogen atom may form a five- to seven-membered ring, preferably hydrogen, an alkyl radical having 1 to 20 carbon atoms or a -[-X i -] n -H radical, w is a positive integer and x, y and z are independently zero or a positive integer, - in which n is a positive integer, and - in which each X i for i = 1 to n is independently selected from the group consisting of -CH 2 -CH 2 -O-, - CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, - C(CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O-, -CH(C 2 H 5)-CH 2 -O- and - CH(CH 3)-CH(CH 3)-O-, preferably selected from the group consisting of -CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, -C(CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O-, - CH(C 2 H 5)-CH 2 -O- and -CH(CH 3)-CH(CH 3)-O-, more preferably selected from the group consisting of - CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, - C (CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O- and -CH(C 2 H 5)-CH 2 -O- and most preferably selected from the group consisting of -CH 2 -CH(C 2 H 5)-O-, -CH(C 2 H 5)-CH 2 -O-, - CH 2 -CH(CH 3)-O- and -CH(CH 3)-CH 2 -O-, and especially selected from the group consisting of -CH 2 -CH(CH 3)-O- and -CH(CH 3)-CH 2 -O-, with the proviso that - the sum total of x, y and z is non-zero, - at least one of the R 1, R 2, R 3, R 4, R 5 and R 6 radicals is not hydrogen and - at least one of the R 1, R 2, R 3, R 4, R 5 and R 6 radicals represents a -[-X i -] n -H radical, in gasoline fuels for avoidance and/or reduction of the formation of deposits at injection nozzles in direct injection gasoline engines and/or removing and/or reducing existing deposits at injection nozzles in direct injection gasoline engines. R is a divalent organic radical, preferably an alkylene radical having 2 to 10 carbon atoms, R 1, R 2, R 3, R 4, R 5 and R 6 are independently hydrogen or a monovalent organic radical or a -[-X i -] n -H radical or R 1 and R 2 collectively and together with the nitrogen atom may form a five- to seven-membered ring, preferably hydrogen, an alkyl radical having 1 to 20 carbon atoms or a -[-X i -] n -H radical, w is a positive integer and x, y and z are independently zero or a positive integer, - in which n is a positive integer, and - in which each X i for i = 1 to n is independently selected from the group consisting of -CH 2 -CH 2 -O-, - CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, - C(CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O-, -CH(C 2 H 5)-CH 2 -O- and - CH(CH 3)-CH(CH 3)-O-, preferably selected from the group consisting of -CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, -C(CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O-, - CH(C 2 H 5)-CH 2 -O- and -CH(CH 3)-CH(CH 3)-O-, more preferably selected from the group consisting of - CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, - C (CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O- and -CH(C 2 H 5)-CH 2 -O- and most preferably selected from the group consisting of -CH 2 -CH(C 2 H 5)-O-, -CH(C 2 H 5)-CH 2 -O-, - CH 2 -CH(CH 3)-O- and -CH(CH 3)-CH 2 -O-, and especially selected from the group consisting of -CH 2 -CH(CH 3)-O- and -CH(CH 3)-CH 2 -O-, with the proviso that - the sum total of x, y and z is non-zero, - at least one of the R 1, R 2, R 3, R 4, R 5 and R 6 radicals is not hydrogen and - at least one of the R 1, R 2, R 3, R 4, R 5 and R 6 radicals represents a -[-X i -] n -H radical, in gasoline fuels for avoidance and/or reduction of the formation of deposits at injection nozzles in direct injection gasoline engines and/or removing and/or reducing existing deposits at injection nozzles in direct injection gasoline engines. - in which n is a positive integer, and - in which each X i for i = 1 to n is independently selected from the group consisting of -CH 2 -CH 2 -O-, - CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, - C(CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O-, -CH(C 2 H 5)-CH 2 -O- and - CH(CH 3)-CH(CH 3)-O-, preferably selected from the group consisting of -CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, -C(CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O-, - CH(C 2 H 5)-CH 2 -O- and -CH(CH 3)-CH(CH 3)-O-, more preferably selected from the group consisting of - CH 2 -CH(CH 3)-O-, -CH(CH 3)-CH 2 -O-, -CH 2 -C(CH 3) 2 -O-, - C (CH 3) 2 -CH 2 -O-, -CH 2 -CH(C 2 H 5)-O- and -CH(C 2 H 5)-CH 2 -O- and most preferably selected from the group consisting of -CH 2 -CH(C 2 H 5)-O-, -CH(C 2 H 5)-CH 2 -O-, - CH 2 -CH(CH 3)-O- and -CH(CH 3)-CH 2 -O-, and especially selected from the group consisting of -CH 2 -CH(CH 3)-O- and -CH(CH 3)-CH 2 -O-, - the sum total of x, y and z is non-zero, - at least one of the R 1, R 2, R 3, R 4, R 5 and R 6 radicals is not hydrogen and - at least one of the R 1, R 2, R 3, R 4, R 5 and R 6 radicals represents a -[-X i -] n -H radical,