Eddie, Have you not got a generator?
Of course, I'm assuming we are OK to run generators tomorrow?
As Telboy said, don't worry about oils until you are trackside tomorrow, You can never guess on oils as track conditions, track layout, air temp, track temp etc... are all a mystery till you get there lol
I would wait till after practice mate then take it from there, If you want any advice/help, just come and find us