I put proper steering box lube in mine. Like corn head grease its about 600 weight oil, it flows like treacle. After 6 months it started coming out through the thread ofvthe lower adjusting nut. Without too much hassle I unbolted the steering box enough to lift it up a bit, remove the lower adjustment nut and screw, drain the oil (leave it for a week dripping in to a container). Then I wound PTFE plumbing tape around the thread with a skim of RTV around the nut face. Reassembled it and all good now.
