The dynamic aspects of solubilisation of oils into surfactant systems, often forming microemulsions, are only little known so far, despite their importance for optimising systems with respect to solubilising and releasing hydrophobic compounds. This question will be addressed by using mixtures of deuterated and protiated oils. We will address the question of oil exchange between microemulsion droplets as well as oil incorporation into micellar systems. Here we will look at effects of electrostatic repulsion, the presence of cosurfactants and also look at different surfactant types, with a focus on a system with a particularly stable surfactant monolayer. From these experiments we expect to gain substantial new insights into the basic mechanisms that control the transport of hydrophobes in surfactant systems and thereby contribute to the development of delivery and uptake systems.