I have drained the oil from two of my geared hubs and they contained about 6 oz. each and seemed to be diluted with diesel. (A lot of leakage? seemed to be visible on both hubs and inner wheels.) I was told that the breather tube is a flaw and should be cut high and capped to avoid drawing diesel into the hubs, unless one wants to drive in deep water. After draining, I poured 32 oz. of 80/90 gear oil into each hub. Any comments? Is 32oz a good amount? Thanks!!!