Polymeric fuel additive and method of making the same, and fuel containing the additive

A method of making a polymeric fuel additive, said method comprising the steps of:

• (a) isothermally mixing substantially equimolar amounts of an ethoxylated alcohol and an amide, said ethoxylated alcohol comprising at least about 75 weight percent of at least one linear straight-chain alcohol having a hydrocarbon chain length of about nine to about fifteen carbon atoms, and said amide being the substantially equimolar reaction product of an alcohol amine and an alkyl ester of a fatty acid, wherein each of said alcohol and said amide is dissolved in a solvent;
• and,
• (b) isothermally mixing the product of step (a) with an ethoxylated fatty acid or derivative having a hydrocarbon chain length of about nine to about fifteen carbon atoms to form said polymeric fuel additive, wherein said fatty acid or derivative is dissolved in a solvent.

A polymeric fuel additive comprising the reaction product of:

• (a) a mixture of an ethoxylated alcohol and an amide, said ethoxylated alcohol comprising at least about 75 weight percent of at least one linear straight-chain alcohol having a hydrocarbon chain length of about nine to about fifteen carbon atoms, and said amide being a substantially equimolar reaction product of an alcohol amine and an alkyl ester of a fatty acid;
• and,
• (b) an ethoxylated fatty acid or derivative having a hydrocarbon chain length of about nine to about fifteen carbon atoms.