A fuel performance additive comprising: a quaternary ammonium salt obtained from the reaction of a nitrogen containing compound having at least a tertiary amino group and a quaternizing agent; and a demulsifier component including a blend of (i), (ii) and (iii): (i) at least two alkoxylated phenol formaldehyde polymers, including 10 to 50 weight percent, of the first alkoxylated phenol formaldehyde polymer having a relative solubility number of 18 to 22 and 10 to 50 weight percent of the second alkoxylated phenol formaldehyde polymer having a relative solubility number of 12 to 16; (ii) 10 to about 50 weight percent of an alkoxylated fatty acid polymer having a relative solubility number of 12 to 16; (iii) 1 to 15 weight percent of an alkoxylated polyimine polymer having a relative solubility number of less than 10; wherein a weight ratio of the quaternary ammonium salt to the demulsifier component is in the range of 5:1 to 1:1; wherein the relative solubility number of the polymers is determined by titration against water of 1 gram of the polymer in 30 grams of solvent consisting of 5 weight percent xylene, 20 weight percent diethylene glycol monobutyl ether, and 75 weight percent dimethyl isosorbide, wherein the end point of the titration is when a persistent turbidity holds for at least one minute and the volume of water in milliliters used in the titration is the relative solubility number. a quaternary ammonium salt obtained from the reaction of a nitrogen containing compound having at least a tertiary amino group and a quaternizing agent; and a demulsifier component including a blend of (i), (ii) and (iii): (i) at least two alkoxylated phenol formaldehyde polymers, including 10 to 50 weight percent, of the first alkoxylated phenol formaldehyde polymer having a relative solubility number of 18 to 22 and 10 to 50 weight percent of the second alkoxylated phenol formaldehyde polymer having a relative solubility number of 12 to 16; (ii) 10 to about 50 weight percent of an alkoxylated fatty acid polymer having a relative solubility number of 12 to 16; (iii) 1 to 15 weight percent of an alkoxylated polyimine polymer having a relative solubility number of less than 10; (i) at least two alkoxylated phenol formaldehyde polymers, including 10 to 50 weight percent, of the first alkoxylated phenol formaldehyde polymer having a relative solubility number of 18 to 22 and 10 to 50 weight percent of the second alkoxylated phenol formaldehyde polymer having a relative solubility number of 12 to 16; (ii) 10 to about 50 weight percent of an alkoxylated fatty acid polymer having a relative solubility number of 12 to 16; (iii) 1 to 15 weight percent of an alkoxylated polyimine polymer having a relative solubility number of less than 10; wherein a weight ratio of the quaternary ammonium salt to the demulsifier component is in the range of 5:1 to 1:1; wherein the relative solubility number of the polymers is determined by titration against water of 1 gram of the polymer in 30 grams of solvent consisting of 5 weight percent xylene, 20 weight percent diethylene glycol monobutyl ether, and 75 weight percent dimethyl isosorbide, wherein the end point of the titration is when a persistent turbidity holds for at least one minute and the volume of water in milliliters used in the titration is the relative solubility number. <EOS>