I managed 25,000 miles on my 2014 4/4 before changing king pins..also done by Cain.

I got used to greasing every 500 miles.

It is not unknown for oe king pins to be worn at 10,000 if not well greased I am told.

" I LOVE THE SOUND OF THROTTLE BODIES IN THE MORNING " (ROBERT DUVAL IN "APOCOLYPSE NOW " )