I never soaked mine in oil or anything and the middle of my saddle touches the black bars underneath now when Im sitting on it.

That started at about 5k and now I am at about 8k on it.

I have not tensioned it because I have read that once you start doing that its a short down hill from there to the trash can.

I expected the saddle to last decades from what I read. What gives? Should I just tension it and go on with my life or what?