Motor fuel composition

Claim 1

A motor fuel composition comprising a mixture of hydrocarbons boiling in the gasoline boiling range containing: (I) from about 0.0005-0.5 weight percent of the reaction product of: (a) 1 mole of maleic anhydride; (b) 1-2 moles of a polyether polyamine represented by the formula: ##STR17## where b has a value from about 5-150, a+c has a value from about 2-20, and Z is selected from the group consisting of (i) a hydrogen atom; (ii) an alkyl radical having from 1-6 carbon atoms; (iii) a polyether radical of the formula ##STR18## where b has a value from about 5-150, and a+c has a value from about 2-20; (iv) an alkylene polyether radical of the formula ##STR19## where R 1 is an alkylene radical having from about 1-6 carbon atoms, b has a value from about 5-150, and a+c has a value from about 2-20; and (v) a radical of the formula R.sub.2 (NH--R.sub.3).sub.x -- where R 2 is an alkyl radical having from about 1-24 carbon atoms, R 3 is an alkylene radical having from about 1-6 carbon atoms, and x has a value from about 1-10; and (c) 1-2 moles of a hydrocarbyl polyamine of the formula R.sub.2 (NH--R.sub.3).sub.x --NH.sub.2 where R 2 is a alkyl radical having from about 1-24 carbon atoms, R 3 is an alkylene radical having from about 1-6 carbon atoms, and x has a value from about 1-10; and (II) from about 0.01-1.0 volume percent, based on the total volume of the motor fuel composition, of a polyolefin polymer, copolymer, or the corresponding hydrogenated polymer or copolymer, or mixtures thereof, of a C 2 -C 6 unsaturated hydrocarbon, said polyolefin polymer or copolymer having a molecular weight in the range from about 500-3500.