| abstract |
A fuel additive concentrate for gasoline, a gasoline fuel containing an additive mixture, a method for reducing wear in engines and fuel delivery systems of gasoline engines, and a method for improving injector performance . The additive concentrate includes an aromatic solvent and a mixture containing (i) N,N-bis(2-hydroxyethyl)alkylamide, (ii) 2-((2-(bis(2-hydroxyethyl) (yl)amino)ethyl)-amino)ethyl alkanoates and N-(2-(bis(2-hydroxyethyl)-amino)ethyl)-N-(2-hydroxyethyl)alkylamides , and (iii) fatty acid esters and amides derived from the self-condensation products of diethanolamine (DEA) containing at least 3 amino groups. The weight ratio of (i) to (ii) to (iii) in the concentrate is in the range of about 8:2:0 to about 2:5:3. The fuel additive mixture is substantially free of glycerin and remains fluid at temperatures as low as about -20°C. |