I find Neetsfoot oil a bit too thin for my tastes although many use it.I use Mink Oil,a paste that comes in a shoe polish can.You sort of rub it in to the leather and it seldom leaves any residue.Treat the seat as you would any leather coat.I bet Stepfan would be a good consultant on weatherproofing leather due to his climate and he seems to go out in all conditions.

That bit on throwing the seat in old motor oil has possibilities on long trips so the azz does not run out of gazz.