in the 1966 International Zoo Yearbook (vol.6) there's an article about keeping olingos at the Louisville Zoo (USA), including experiments regarding interactions with other species in mixed enclosures. 1.2 olingos were placed in an enclosure with 1.2 kinkajous and the results were that although the kinkajous were dominant "after a few days with them, [the olingos] lost most of their initial timidity, and the flight distance shrunk from about four feet to a few inches. Neither species seemed to bother the other, but it was absolutely necessary to provide a very large cage and several feeding stations for the benefit of the weaker olingos."
(The olingos were also trialled with 1.2 douroucoulis, which dispalyed a certain amount of fear of the olingos but never became overtly panicky, although the flight distance was two feet; and with an agouti which displayed some explosive flight reactions, apparently associated with the noise of the olingos moving through the branches in the cage).