
I think you may be able to use biological washing powder if necessary (though I could be wrong)to remove the grease/oil.
I would then make sure your washer detergent drawer is free from all washing powder and run the machine empty on a hot wash to remove all traces of detergent.
Then wash the jacket again with Nikwax Wash In or soap flakes (to remove the residue from the washing powder). *You may wish to do another seperate rinse.
Following this reproof the jacket.
You can use TX direct on Event fabrics (recent Nikwax literature I have seen states this).
*As Simon says a few weeks ago there was quite a big thread on washing Event clothing - a search will probably bring it up. IIRC some manufactures recommended a second rinse.
HTH
(Crossed thread with Simon)