Imidazoline functionalized oxidized fatty substance emulsifiers are made by obtaining a fatty substance composition; performing an oxidative oligomerization of the fatty substance composition to produce an oxidized fatty substance composition comprising from about 10 to about 75% by weight of oligomeric fatty acid components based on the total weight of fatty acid containing components in the composition; reacting the oxidized fatty substance composition with a polyamine comprising at least one ethylene diamine functional group with at least three hydrogens attached to the two nitrogens to form an aminoethylamido functionalized oxidized fatty substance composition; and forming an imidazoline functionalized oxidized fatty substance emulsifier from the amino-ethylamido functionalized oxidized fatty substance composition. Such compositions are particularly useful in asphalt applications and corrosion inhibition.