I don`t know about Kubota`s, but I have a New Holland with
over 2700 hours on it,and it still runs great.
The motor has never been touched, all its done it`s hole life is mow grass with a 60" mid mower and other odds and ends.Just change all the fluids regularly, also it`s a Hydro thats also never been touched. I would think that a Kubota should do just as good.