Fuel additive for improved performance in fuel injected engines

A method of improving the injector performance of a fuel injected diesel engine comprising operating the engine on a fuel composition comprising a major amount of fuel containing bio-diesel components and from about 5 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially free of non-covalently bonded anion species, and, wherein the reaction product present in the fuel improves the injector performance of the engine by at least about 80% when measured according to a CEC F98-08 DW10 test.

A method of operating a fuel injected diesel engine comprising combusting in the engine a fuel composition comprising a major amount of fuel and from about 5 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group wherein the hydrocarbyl substituted compound is selected from the group consisting of C10-C30-alkyl or alkenyl-substituted amidopropyldimethylamines and C12-C200alkyl or alkenyl-substituted succinic-carbonyldimethylamines and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially free of non-covalently bonded anion species.

An additive concentrate for a fuel for use in a injected fuel diesel engine comprising a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group wherein the hydrocarbyl substituted compound is selected from the group consisting of C10-C30-alkyl or alkenyl-substituted amidopropyldimethylamines and C12-C200-alkyl or alkenyl-substituted succinic-carbonyldimethylamines and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially free of non-covalently bonded anion species;

• and at least one component selected from the group consisting of diluents, carrier fluids, compatibilizers, cetane improvers, corrosion inhibitors, cold flow improvers (CFPP additive), pour point depressants, solvents, demulsifiers, lubricity additives, friction modifiers, amine stabilizers, combustion improvers, dispersants, antioxidants, heat stabilizers, conductivity improvers, metal deactivators, marker dyes, organic nitrate ignition accelerators, and cyclomatic manganese tricarbonyl compounds.