I oil it right before my first ride, then after every ride with conditioning.
Condition or oil it after every ride and keep a saddle cover on it when you aren't using it.
I do exactly the same than Vieira, I try to wash it every time I ride, make it softest as possible! :)
I usually oil mine before the first ride to create grip. After that I'll wash it with the proper soap everyday I ride if I can.