If it is really the oil, then the only things you can do is:
a) make equipment changes (like chitown suggested)
b) do the best with the situation and play straight to the pocket.
I had a similar situation last weekend in league: long (45') oil, gutter to gutter. My Eliminator which is my normal weapon of choice on greasy lanes did hardly move, I tried a Blade Particle (800 grit and drilled leverage) I had luckily with me and it merely worked - but also did not hook very much. I scored low tghis day, mostly because I was so upset with my release that I did not change my line more to the right... my fault.
--------------------
DizzyFugu --- Reporting from Germany
Team "X": http://homepage.mac.com/timlinked/
"All that we see or seem, is but a dream within a dream..." - Edgar Allen Poe