Another option is gear lube. I machined the sector housing on my '36 pickup for an oil seal and use gear lube in the steering box. I did that job when I restored the pickup in the early 1970s and I don't remember what viscosity gear lube I used. It's still working fine and none has leaked out.
Corn Head Grease is the easiest solution and I would have use it way back then if I'd known about it.
