Fuel composition with lubricity modifier

A method of improving lubricity of a fuel, the method comprising:

• adding to a base fuel:
• (a) 0.015-15 wt. % of a lubricity modifier comprising decarboxylated rosin acid and optionally at least one of a fatty acid, a fatty acid derivative, and mixtures thereof, and (b) 0-5 wt. % of an additive, forming a fuel composition;
• wherein the decarboxylated rosin acid has:
• a flash point of 95-180° C., according to ASTM D92
• a density of 0.9 to 1.0 g/cm3 at 20° C.;
• a viscosity of 15 to 60 cSt at 40° C., according to ASTM D-445;
• and
• an acid value of <50 mg KOH/g, according to ASTM D1240-14 (2018);
• wherein the base fuel is a middle distillate having a sulfur content of <500 ppm;
• wherein the fuel composition has a wear scar diameter of <600 μm, according to ASTM-D6079.

A fuel composition comprising:

• at least 80 wt. % of a base fuel;
• 0-5 wt. % of an additive;
• 0.015-15 wt. % of a lubricity modifier comprising decarboxylated rosin acid and at least one of a fatty acid, a fatty acid derivative, and mixtures thereof, wherein the at least one of a fatty acid, a fatty acid derivative, and mixtures thereof is present in a weight ratio of fatty acid to decarboxylated rosin acid of 10:90 to 90:10;
• wherein the decarboxylated rosin acid has:
• a flash point of 95-180° C., according to ASTM D92
• a density of 0.9 to 1.0 g/cm3 at 20° C.;
• a viscosity of 15 to 60 cSt at 40° C., according to ASTM D-445;
• and
• an acid value of <50 mg KOH/g, according to ASTM D1240-14 (2018);
• wherein the base fuel is a middle distillate having a sulfur content of <500 ppm;
• wherein the fuel composition exhibits a wear scar diameter of <550 μm, according to ASTM-D6079.