Fuel composition containing an amine compound and an ester

A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline range and a fuel consumption reducing amount of a fuel additive composition comprising:

• (a) an alkylphenyl poly(oxybutylene)aminocarbamate having about 5 to about 100 oxybutylene units, wherein the alkyl moiety of the alkylphenyl group is a straight or branched-chain alkyl having from 1 to about 24 carbon atoms and the amine moiety is derived from ethylene diamine or diethylene triamine;
• and
• (b) an ester of a monocarboxylic acid having about 8 to about 30 carbon atoms and a polyhydric alcohol selected from the group consisting of alkylene glycol, glycerol, pentaerytiritol and sorbitol.

A method for reducing fuel consumption in an internal combustion engine which comprises operating said engine with a fuel composition comprising a major amount of hydrocarbons boiling in the gasoline range and a fuel consumption reducing amount of a fuel additive composition comprising:

• (a) an alkylphenyl poly(oxybutylene)aminocarbamate having about 5 to about 100 oxybutylene units, wherein the alkyl moiety of the alkylphenyl group is a straight or branched-chain alkyl having from 1 to about 24 carbon atoms and the amine moiety is derived from ethylene diamine or diethylene triamine;
• and
• (b) an ester of a monocarboxylic acid having about 8 to about 30 carbon atoms and a polyhydric alcohol selected from the group consisting of alkylene glycol, glycerol, pentaerythritol and sorbitol.