On my way down from Fraser's Hill and he was there to say good bye. How nice of him. It was late evening 7:30 pm or thereabout.
Owls are difficult to find because they are night birds, however, Owls have a predictable habit where they might turn up in the same area, and maybe on the same perch, so I read.
Here is where you might come to locate him, it was 1.5 km after the Selangor Dam on your right (ascend).