I have not used the Oiler on any of My 3 Morgans since the year 2000. Also have thrust bearings and no blade or bushing. Although I drill the king pins down to the grease reservoir and use the top zerk to do the job. This is difficult for the average Morgan Owner to do. So just grease the top and bottom. There are all sorts of discussion as to how often one greases. To start I would say once a month or 500 miles. With experience You will be able to tell when You need grease. Your steering will get stiffer. As I use Vesconite Bushes which are self lubricating (to a point). I grease My rigs once a year. Again Vesconite is not easy to source and requires machining. I and My friends are set up for it. Not for everyone.
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Seattle