Winsor IV water-dilutable food-grade microemulsions based on ethoxylated sorbitan esters, water, (R)-(+)-limonene, ethanol, and propylene glycol have been prepared. Tocopherols and lycopene, two active lipophilic antioxidants, have been solubilized in the water-in-oil, bicontinuous, and oil-in-water microemulsions several times more than the oil (R)-(+)-limonene dissolution capacity. Dilution of the aqueous phase and decrease of the surfactant content strongly affect the solubilization capacity and solubilization efficiency of the microemulsion. Self-diffusion coefficients of the water and the oil in the presence of the solubilizates were correlated to the solubilization capacity, and are indicative of the locus of solubilization of the lycopene in the different microstructures.