He was one of the unfortunate ones to witness the death of Future Goku in Age 766. In Age 767, the Androids killed Z Fighters with the exception of Future Gohan and Future Trunks. Along with Future Master Roshi, Future Puar and Future Turtle, Oolong now lives on board a submarine near Kame House.
It is unknown whether he survived when Goku Black invaded Earth since it has been stated by Future Trunks that there's hardly any humans left alive in his timeline. But even if he survived, he would have been killed off by Infinite Zamasu's Chou Makouhou Barrage attack along with any other survivors on Earth and shortly after erased from existence by Future Zen-Oh.