If your Brooks saddle is uncomfortable, do not overdo the "oil treatments".

Adjust it. Front to back and up and down. If it feels like riding a brick then you don't have it right. It should feel great and just get better.

A half inch adjustment will often make the difference from pain to bliss.

For my adjustments, it feels right when it is just a little higher than I think that it should be and a little farther forward than where I think that it ought to be. YMMV